Caption: The researchers at Google Quantum AI and Stanford University explored how measurements can fundamentally change the structure of quantum information in space-time. Credit: Google Quantum AI, designed by Sayo-Art
interesting approach to illustrating a complex scientific concept! This October 18, 2023 news item on phys.org describes the measurement problem,
Quantum mechanics is full of weird phenomena, but perhaps none as weird as the role measurement plays in the theory. Since a measurement tends to destroy the “quantumness” of a system, it seems to be the mysterious link between the quantum and classical world. And in a large system of quantum bits of information, known as “qubits,” the effect of measurements can induce dramatically new behavior, even driving the emergence of entirely new phases of quantum information.
This happens when two competing effects come to a head: interactions and measurement. In a quantum system, when the qubits interact with one another, their information becomes shared nonlocally in an “entangled state.” But if you measure the system, the entanglement is destroyed. The battle between measurement and interactions leads to two distinct phases: one where interactions dominate and entanglement is widespread, and one where measurements dominate, and entanglement is suppressed.
…
An October 18, 2023 Google Quantum AI news release, which originated the news item, on EurekAlert provides more information about a research collaboration between Google and Stanford University,
As reported today [October 18, 2023] in the journal Nature, researchers at Google Quantum AI and Stanford University have observed the crossover between these two regimes — known as a “measurement-induced phase transition” — in a system of up to 70 qubits. This is by far the largest system in which measurement-induced effects have been explored. The researchers also saw signatures of a novel form of “quantum teleportation” — in which an unknown quantum state is transferred from one set of qubits to another — that emerges as a result of these measurements. These studies could help inspire new techniques useful for quantum computing.
One can visualize the entanglement in a system of qubits as an intricate web of connections. When we measure an entangled system, the impact it has on the web depends on the strength of the measurement. It could destroy the web completely, or it could snip and prune selected strands of the web, but leave others intact.
To actually see this web of entanglement in an experiment is notoriously challenging. The web itself is invisible, so researchers can only infer its existence by seeing statistical correlations between the measurement outcomes of qubits. Many, many runs of the same experiment are needed to infer the pattern of the web. This and other challenges have plagued past experiments and limited the study of measurement-induced phase transitions to very small system sizes.
To address these challenges, the researchers used a few experimental sleights of hand. First, they rearranged the order of operations so that all the measurements could be made at the end of the experiment, rather than interleaved throughout, thus reducing the complexity of the experiment. Second, they developed a new way to measure certain features of the web with a single “probe” qubit. In this way, they could learn more about the entanglement web from fewer runs of the experiment than had been previously required. Finally, the probe, like all qubits, was susceptible to unwanted noise in the environment. This is normally seen as a bad thing, as noise can disrupt quantum calculations, but the researchers turned this bug into a feature by noting that the probe’s sensitivity to noise depended on the nature of the entanglement web around it. They could therefore use the probe’s noise sensitivity to infer the entanglement of the whole system.
The team first looked at this difference in sensitivity to noise in the two entanglement regimes and found distinctly different behaviors. When measurements dominated over interactions (the “disentangling phase”), the strands of the web remained relatively short. The probe qubit was only sensitive to the noise of its nearest qubits. In contrast, when the measurements were weaker and entanglement was more widespread (the “entangling phase”) the probe was sensitive to noise throughout the entire system. The crossover between these two sharply contrasting behaviors is a signature of the sought-after measurement-induced phase transition.
The team also demonstrated a novel form of quantum teleportation that emerged naturally from the measurements: by measuring all but two distant qubits in a weakly entangled state, stronger entanglement was generated between those two distant qubits. The ability to generate measurement-induced entanglement across long distances enables the teleportation observed in the experiment.
The stability of entanglement against measurements in the entangling phase could inspire new schemes to make quantum computing more robust to noise. The role that measurements play in driving new phases and physical phenomena is also of fundamental interest to physicists. Stanford professor and co-author of the study, Vedika Khemani, says, “Incorporating measurements into dynamics introduces a whole new playground for many-body physics where many fascinating and new types of non-equilibrium phases could be found. We explore a few of these striking and counter-intuitive measurement induced phenomena in this work, but there is much more richness to be discovered in the future.”
Before getting to the citation for and link to the paper, I have an interview with some of the researchers that was written up by Holly Alyssa MacCormick (Associate Director of Public Relations. Science writer and news editor for Stanford School of Humanities and Sciences) in an October 18, 2023 article for Stanford University, Note 1: Some of this will be redundant; Note 2: Links have been removed,
Harnessing the “weirdness” of quantum mechanics to solve practical problems is the long-standing promise of quantum computing. But much like the state of the cat in Erwin Schrödinger’s famous thought experiment, quantum mechanics is still a box of unknowns. Similar to the solid, liquid, and gas phases of matter, the organization of quantum information, too, can assume different phases. Yet unlike the phases of matter we are familiar with in everyday life, the phases of quantum information are much harder to formulate and observe and as a result have been only a theoretical dream until recently.
Measurements are arguably the weirdest facet of quantum mechanics. Intuition tells us that a state has some definite property and measurement reveals that property. However, measurements in quantum mechanics produce intrinsically random results, and the act of measurement irreversibly changes the state itself. Unlike laptops, smartphones, and other classical computers that rely on binary “bits” to code in the state of 0 (off) or 1 (on), quantum computers use “qubits” of information that can be in the state of 0, 1, or 0 and 1 at the same time, a concept known as superposition. The act of measurement doesn’t just extract information, but also changes the state, randomly “collapsing” a superposition into a specific value (0 or 1).
Moreover, this collapse affects not just the qubit that was measured, but also potentially the entire system—an effect described by Einstein as “spooky action at a distance.” This is due to “entanglement,” a quantum property that allows multiple particles in different places to jointly be in superposition, which is a key ingredient for quantum computing. The collapse of an entangled state can also enable spooky phenomena such as “teleportation,” thereby irretrievably altering the “arrow of time” (the concept that time moves in one forward direction) that governs our everyday experience.
In other words, measurements can be used to fundamentally reorganize the structure of quantum information in space and time.
Now, a new collaboration between Stanford and Google Quantum AI investigates the effect of measurements on quantum systems of many particles on Google’s quantum computer and has obtained the largest experimental demonstration of novel measurement-induced phases of quantum information to date. The study was co-led by Jesse Hoke, a physics graduate student and fellow at Stanford’s Quantum Science and Engineering initiative (Q-FARM), Matteo Ippoliti, a former postdoctoral scholar in the Department of Physics, and senior author Vedika Khemani, associate professor of physics at the Stanford School of Humanities and Sciences and Q-FARM. Their results were published Oct. 18 in the journal Nature.
Here, Hoke, Ippoliti, and Khemani discuss how they observed measurement-induced phases of quantum information—a feat once thought to be beyond the realm of what could be achieved in an experiment—and how their new insights could help pave the way for advancements in quantum science and engineering.
Question: What distinguishes the phases investigated in this study from one another, and what is teleportation?
Ippoliti: In the simplest case, there are two phases. In one phase, the structure of quantum information in the system forms a strongly connected web where qubits share a lot of entanglement, even at large spatial distances and/or temporal separations. In the other, the system is weakly connected, so correlations like entanglement decay quickly with distance or time. These are the two phases that we probed in our experiment. The strongly entangled phase enables teleportation, which occurs when the state of one qubit is instantly transmitted, or “teleported,” to another far away qubit by measuring all but those two qubits.
Question: How did you control when a phase transition occurred
Khemani: The competing forces at play are the interactions between qubits, which tend to build entanglement, and measurements of the qubits, which can destroy it. This is the famous “wave function collapse” of quantum mechanics—think of Schrödinger’s cat “collapsing” into one of two states (dead or alive) when we open the box. However, because of entanglement, the collapse is not restricted to the qubit we directly measure but affects the rest of the system too. By controlling the strength or frequency of measurements on the quantum computer, we can induce a phase transition between an entangled phase and a disentangled one.
Question: What were some of the challenges your team needed to overcome to measure quantum states, and how did you do it?
Ippoliti: Measurements in quantum mechanics are inherently random, which makes observing these phases notoriously challenging. This is because every repetition of our experiment produces a different, random-looking quantum state. This is a problem because detecting entanglement (the feature that sets our two phases apart) requires observations on many copies of the same state. To get around this difficulty, we developed a diagnostic that cross-correlates data from the quantum processor with the results of simulations on classical computers. This hybrid quantum-classical diagnostic allowed us to see evidence of the different phases on up to 70 qubits, making this one of the largest digital quantum simulations and experiments to date.
Hoke: Another challenge was that quantum experiments are currently limited by environmental noise. Entanglement is a delicate resource that is easily destroyed by interactions from the outside environment, which is the primary challenge in quantum computing. In our setup, we probe the entanglement structure between the system’s qubits, which is destroyed if the system is not perfectly isolated and instead gets entangled with the surrounding environment. We addressed this challenge by devising a diagnostic that uses noise as a feature rather than a bug—the two phases (weak and strong entanglement) respond to noise in different ways, and we used this as a probe of the phases.
Khemani: In addition, we used the fact that the “arrow of time” loses meaning with measurement-induced teleportation. This allowed us to reorganize the sequence of operations on the quantum computer in advantageous ways to mitigate the effects of noise and to devise new probes of the organization of quantum information in space-time.
Question: What do the findings mean?
Khemani: At the level of fundamental science, our experiments demonstrate new phenomena that extend our familiar concepts of “phase structure.” Instead of thinking of measurements merely as probes, we are now thinking of them as an intrinsic part of quantum dynamics, which can be used to create and manipulate novel quantum correlations. At the level of applications, using measurements to robustly generate structured entanglement is inspiring new ways to make quantum computing more robust against noise. More generally, our understanding of general phases of quantum information and dynamics is still nascent, and many exciting surprises await.
Acknowledgements
Hoke conducted research on this study while working as an intern at Google Quantum AI under the supervision of Xiao Mi and Pedram Roushan. Ippoliti is now an assistant professor of physics at the University of Texas at Austin. Additional co-authors on this study include the Google Quantum AI team and researchers from the University of Massachusetts, Amherst; Auburn University; University of Technology, Sydney; University of California, Riverside; and Columbia University. The full list of authors is available in the Nature paper.
Ippoliti was funded in part by the Gordon and Betty Moore Foundation’s EPiQS Initiative. Khemani was funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences; the Alfred P. Sloan Foundation; and the Packard Foundation.
Here’s a link to and a citation for the paper, Note: There are well over 100 contributors to the paper and I have not listed each one separately, You can find the list if you go to the Nature paper and click on Google Quantum AI and Collaborators in the author field,
Be careful not to fall, is a familiar stricture when applied to ‘leaning out of windows’ supplying a frisson of danger to the ‘lean’ but in German, ‘aus dem Fenster lehnen’ or ‘lean out of the window’, is an expression for interdisciplinarity. It’s a nice touch for a book about an art/physics collaboration where it can feel ‘dangerous’ to move so far out of your comfort zone. The book is described this way in its Vancouver (Canada) Public Library catalogue entry,
Art and physics collide in this expansive exploration of how knowledge can be translated across disciplinary communities to activate new aesthetic and scientific perspectives.
Leaning Out of Windows shares findings from a six-year collaboration by a group of artists and physicists exploring the connections and differences between the language they use [emphasis mine], the means by which they develop knowledge, how that knowledge is visualized, and, ultimately, how they seek to understand the universe. Physicists from TRIUMF, Canada’s particle physics accelerator, presented key concepts in the physics of Antimatter, Emergence, and In/visible Forces to artists convened by Emily Carr University of Art + Design; the participants then generated conversations, process drawings, diagrams, field notes, and works of art. The “wondrous back-and-forth” of this process allowed both scientists and artists to, as Koenig [Ingrid Koenig] and Cutler [Randy Lee Cutler] describe, “lean out of our respective fields of inquiry and inhabit the infinite spaces of not knowing.”
From this leaning into uncertainty comes a rich array of work towards furthering the shared project of artists and scientists in shaping cultural understandings of the universe: Otoniya J. Okot Bitek reflects on the invisible forces of power; Jess H. Brewer contemplates emergence, free will, and magic; Mimi Gellman looks at the resonances between Indigenous Knowledge and physics; Jeff Derksen finds Hegelian dialectics within the matter-antimatter process; Sanem Güvenç considers the possibilities of the void; Nirmal Raj ponders the universe’s “special moment of light and visibility” we happen to inhabit; Sadira Rodrigues eschews the artificiality of the lab for a “boring berm of dirt”; and Marina Roy metaphorically turns beams of stable and radioactive gold particles into art of pigments, oils, liquid plastic, and wood. Combined with additional essays, diagrams, and artworks, these texts and artworks live in the intersection of disparate fields that nonetheless share a deep curiosity of the world and our place within it, and a dedication to building and sharing knowledges.
Self-published, “Leaning Out of Windows: An Art and Physics Collaboration” and edited by Ingrid Koenig & Randy Lee Cutler (who also wrote many of the essays) was produced through an entity known as Figure 1 (located in Vancouver). It can be purchased for $45 CAD here on the Figure 1 website or $41.71 (CAD?) on Amazon. (Weirdly, if you look at the back outside cover you’ll see a price of $45 USD.)
Kind of a book
“Leaning” functions as three kinds of books in one package. First, it is documentation for a six year project funded by the Social Sciences and Humanities Research Council of Canada (SSHRC), second, a collection of essays, and, third, a catalogue for three inter-related exhibitions. (Aside: my focus is primarily on the text for an informal book review.)
Like an art exhibition catalogue, this book is printed in a large, awkward to hold format, with shiny (coated) pages. It makes reading the essays and documentation a little challenging but perfect for a picture book/coffee table book where the images are supposed to look good.
I particularly liked the maps for the various phases of the project and the images for phase 1 showing what happens when an image is passed from one artist to the next, without explanation, asking for a new image to be produced and passed on to yet another artist and so on. There is no discussion amongst the artists about the initial impetus (the first artist in the stream of four met with physicists at a science symposium to talk about antimatter).
Ingrid Koenig, Antimatter Process Design (detail), 2017. This diagram shows the process design of five different streams of interactions, mapping out routes for 26 artists and 26 physicists, as well as an experimental class taught by Koenig at Emily Carr University of Art and Design. [downloaded from https://canadianart.ca/features/searching-for-the-language-of-the-universe/]
Unexpectedly, the documentation proved to be a highlight for me. BTW, you can find out more about the Leaning Out of Windows (LOoW) project (e.g. participants, phases, and art/science resources) on its website.
Koenig should be congratulated for getting as much publicity for the book as possible, given the topic and that there are no celebrities involved. CBC gave it a mention (May 8, 2023) on its Books: Leaning Out of Windows webpage. It also got a mention by Dana Gee in a May 12, 2023 ‘Books brief‘ posting on the Vancouver Sun website.
Plus, there were a couple of articles in an art magazine highlighting the art/science project while it was in progress featuring the few images I was about to access online for this project.
A January 6, 2020 article in Canadian Art Magazine by Randy Lee Cutler and Ingrid Koenig introduces the project (Note: I’ll revisit the “metaphor and analogy” mention in this article and throughout the LOoW book later in this post),
The disciplines of art and physics share certain critical perspectives: both deal with how metaphor and analogy inform creative processes. Additionally, artists and physicists address issues of the imagination, creative thinking and communication, and how meaning is made through theoretical research and process-based investigations. There are also important differences in these perspectives. Art brings an appreciation for abstract or non-representational practices. Physics research addresses complex problems relevant to understanding the study of matter and motion through space and time. Physicists also contribute knowledge about how the universe behaves. Together, the achievements of art and physics allow the possibility of a much richer understanding of the nature of reality than each field can contribute individually.
There’s a January 13, 2020 article in Canadian Art Magazine by Perrin Grauer featuring Mimi Gellman, Note: A link has been removed,
Artwork by artist and ECU Associate Professor Mimi Gellman was selected to appear on the cover of the current issue of Canadian Art magazine.
The gleaming, otherworldly image graces the magazine’s issue on antimatter —a subject which “presents a mirror world of abstract phenomena: time reversals, mutual annihilation, cosmic rays, cloud chambers, an infinite sea of sub-atomic particles that parallels our ‘real’ world of matter,” according to the issue’s editors.
Mimi describes her work as approaching some of the affinities between the biological, the perceptual, the cultural and the astronomical.
“My drawings do not explore the exterior world we perceive but rather what I call the ‘architecture of consciousness’ which permits us to perceive it,” she says.
“Recalling astronomical diagrams and reflecting the mixture of hybrid cultural worldviews in my background, they reveal deep similarities between the dimension explored by sub-atomic physics and the implicit interiority of contemporary art.”
…
I’m sorry I never saw any announcements for the project exhibitions, all of which seemed to have taken place at the Emily Carr University of Art + Design. There were three concepts each explored in three exhibitions, with different artists each time, titled: Antimatter, Emergence, and In/visible Forces, respectively.
A bouquet or two and a few nitpicks
Randy Lee Cutler and Ingrid Koenig have a wonderful quote from Karen Barad, physicist and philosopher, in their essay titled, “Collaborative Research between Artists and Physicists,”
Barad introduces the concept of intra-action and the fluidity of materialization through our bodily entanglements—through intra-action our bodies remain entangled with those around us. “Not only subjects but also objects are permeated through and through with their entangled kin, the other is not just in one’s skin, but in one’s bones, in one’s belly in one’s heart, in one’s nucleus, in one’s past and future.This is a true for electrons as it is for brittlestars as it is for the differentially constituted human.” As Barad asks herself, “How do I know where my physics begins and ends?” … [p. 13]
To the left of the page is a black and white photograph of entangled cables captioned, “GRIFFIN (Gamma Ray Infrastructure for Fundamental Investigations of Nuclei- TRIUMF.” It’s a nice touch and points to the difficulty of ‘illustrating’ or producing visual art in response to physics ideas such as quantum entanglement, something Einstein called, ‘spooky action at a distance’. From the Quantum entanglement Wikipedia entry, Note: Links have been removed,
Quantum entanglement is the phenomenon that occurs when a group of particles are generated, interact, or share spatial proximity in a way such that the quantum state of each particle of the group cannot be described independently of the state of the others [[emphasis mine], including when the particles are separated by a large distance [emphasis mine]. The topic of quantum entanglement is at the heart of the disparity between classical and quantum physics: entanglement is a primary feature of quantum mechanics not present in classical mechanics.[1]
Some of the essays
One essay that stood out in LOoW, was “A Boring Berm of Dirt’ (pp. 141-7) by Sadira Rodrigues. She notes that dirt and soil are not the same; one is dead (dirt) and the other is living (soil) and that the berm has an important role at TRIUMF. If you want a more specific discussion of the difference between dirt and soil, see David Beaulieu’s February 23, 2023 essay (Soil vs. Dirt: What’s the Difference?) on The Spruce website.
Rodrigues’ essay (part of the Emergence concept) situates the work physically (word play alert: physics/physically) whereas all of the other work is based on ideas.
In “Boring Berm … ,” radioactivity is mentioned, a term which is largely taboo these days due its association with poisoning, bombs, and death. The eassy goes into fascinating detail about TRIUMF’s underground facility and how the facility deals with its nuclear waste and the role that the berm plays. (On a more fanciful note, the danger in the title of the book is given another dimension in this essay focused on nuclear topics.) Regardless, the essay was definitely an eye-opener.
Aside: The institution has been rebranded from: TRIUMF (Canada’s National Laboratory for Particle and Nuclear Physics) to: TRIUMF (Canada’s national particle accelerator centre). You can find a reference to the ‘nuclear’ name in my October 2, 2018 posting although the name was already changed, probably in the early to mid-2010s. There is no mention of the ‘nuclear’ name in TRIUMF’s Wikipedia entry, accessed August 22, 2023.
Gellman and language
Mimi Gellman’s essay, “Crossing No Divide: Mapping Affinities in Art and Science” evokes unity, as can be seen in the title. She’s one of the more ‘lyrical’ writers,
There is a place in our imagination where east or west, or large or small, or any other opposites cease to be productive contradictions. As an artist and educator, I have become interested in the non-binary and resonance between Indigenous Knowledge and physics, between art and science, and between traditional ways of considering cognition and thinking with the hand. [p. 33]
This is how Gellman is described for the January 13, 2020 article in Canadian Art Magazine, which is archived on the Emily Carr University of Art + Design (ECUAD) website,
Mimi Gellman is an Anishinaabe/Ashkenazi (Ojibway-Jewish Métis) visual artist and educator with a multi-streamed practice in architectural glass and conceptual installation. She is currently an Associate Professor in the Faculty of Culture + Community at Emily Carr University of Art + Design in Vancouver, Canada, and is completing her research praxis PhD in Cultural Studies at Queen’s University on the metaphysics of Indigenous mapping.
…
She highlights some interesting observations about language and thinking,
The Ojibwe language, Anishinaabemowin, like many Indigenous languages is verb-based in contrast with Western languages’ noun-based constructions and these have deep implications for the development of one’s worldview. …
I suspect anyone who speaks more than one language can testify to the observation that language affects one’s worldview. More academically, it’s called linguistic relativity or the Sapir-Whorf hypothesis. I find it hard to believe that it’s considered a controversial idea but here goes from the Linguistic relativity Wikipedia entry, Note: Links have been removed,
The idea of linguistic relativity, also known as the Sapir–Whorf hypothesis /səˌpɪər ˈhwɔːrf/ sə-PEER WHORF, the Whorf hypothesis, or Whorfianism, is a principle suggesting that the structure of a language influences its speakers’ worldview or cognition, and thus individuals’ languages determine or shape their perceptions of the world.[1]
The hypothesis has long been controversial, and many different, often contradictory variations have existed throughout its history.[2] The strong hypothesis of linguistic relativity, now referred to as linguistic determinism, says that language determines thought and that linguistic categories limit and restrict cognitive categories. This was held by some of the early linguists before World War II,[3] but it is generally agreed to be false by modern linguists.[4] Nevertheless, research has produced positive empirical evidence supporting a weaker version of linguistic relativity:[4][3] that a language’s structures influence and shape a speaker’s perceptions, without strictly limiting or obstructing them.
…
Gettng back to Gellman, language, linguistic relativity, worldviews, and, adding physics/science, she quotes James (Sa’ke’j) Youngblood Henderson “a research fellow at the Native Law Centre of Canada, University of Saskatchewan College of Law. He was born to the Bear Clan of the Chickasaw Nation and Cheyenne Tribe in Oklahoma in 1944 and is married to Marie Battiste, a Mi’kmaw educator. In 1974, he received a juris doctorate in law from Harvard Law School,”
[at a 1993 dialogue between Western and Indigenous scientists …]
[Youngblood Henderson] We don’t have one god. You need a noun-based language to have one god. We have forces. All forces are equal and you are just the amplifier of the forces. The way you conduct your life and the dignity you give to other things gives you access to other forces. Even trees are verbs instead of nouns. The Mi’kmaq named their trees for the sound the wind makes when it blows through the trees during the autumn about an hour after the sunset, when the wind usually comes from a certain direction. So one might be like a ‘shu-shu’ something and another more like a ‘tinka-tinka’ something. Although physics in the western world has been essentially the quest for the smallest noun (which used to be a-tom, ‘that which cannot be further divided’), as they were inside the atom things weren’t acting like nouns anymore. The physicists were intrigued with the possibilities inherent in a language that didn’t depend on nouns but could move right to verbs when the circumstances were appropriate.3
…
This work from Gellman is a favourite of mine, and is featured in the January 13, 2020 article in Canadian Art Magazine and you’ll find it in the book,
Image courtesy Mimi Gellman.
Mimi Gellman, ‘Invisible Landscapes,’ 2017. Conte on Japanese Obonai paper, 63.5 x 48.3 cm.
[downloaded from https://www.ecuad.ca/news/2020/canadian-art-magazine-features-cover-artwork-by-mimi-gellman]
There are more LOoW images embedded in the January 6, 2020 article on the Canadian Art Magazine website.
Derksen and his poem
Karl Marx, Friedrich Engels, Theodor W. Adorno, and Georg Wilhelm Friedrich Hegel were unexpected guest stars in Derksen’s essay, “From Two to Another: The Anti-Matter Series,” given that he is an award-winning poet. These days he has this on his profile page on the Department of English, Simon Fraser University website, “Dean and Associate Provost, Graduate and Postdoctoral Studies.”
From LOoW,
Karl Marx and Friedrich Engels are well known as materialists, having helped define a materialist view of history, of economics and of capitalism. And both Marx and Engels aimed to develop Marxism as a science rather than a model based on naturalizing capitalism and “man.” … [p. 89]
Derksen includes a diagram/poem, for which I can’t find a digitized copy, but here’s what he had to say about it,
My mode of looking at this [antimatter] is through poetic research —which itself does not aim to arrive at a synthesis but instead looks for relational moments. In this I also see a poetic language emerge from both discourses [artistic/scientific]—matter-antimatter thought and dialectical thinking. For my contribution to Leaning Out of Windows, I have tried to combine the scientific aspect of dialectical thinking with the poetic aspect of matter-antimatter thought and experimentation. To do this, I have taken the diagrammatic rendering of Carl Anderson’s experiment which resulted in his 1932 paper … as a model to relate the dialectical thinking at the heart of Marxism and matter-antimatter thought. …
Towards the end of his essay, Derksen notes that he’s working (on what I would call) a real poem. I sent an email to Derksen on August 21, 2023 asking,
Have you written the poem or is still in progress?
If you have written it, has it been published or is it being readied for publication? I would be happy to mention where.
If you do have it ready and would like to ‘soft launch’ the poem, could you send it to me for inclusion in the post?
No response at this time.
Flashback to Alan Storey
I think it was 2002 or 2003 when I first heard about an artist at TRIUMF, Alan Storey. The ‘residency’ was the product of a joint effort between the Canada Council for the Arts (Canada Council) and the Natural Sciences and Engineering Council of Canada (NSERC).
I spoke with Storey towards the end of his ;residency; and he was a little disappointed because nothing much had come of it. Nobody really seemed to know what to do with an artist at a nuclear facility and he didn’t really didn’t seem to know either. (Alan Storey’s work can be seen in the City of Vancouver’s collection of public art works here and on his website.)
My guess is that someone had a great idea but didn’t think past the ‘let’s give money to science institutions so they can host some artists who will magically produce wonderful things for us’ stage of thinking. While there is no longer a Canada Council/NSERC programme, it’s clear from LOoW (funded by the Social Sciences and Humanities Research Council of Canada [SSHRC]) that lessons have been learned.
Kudos to David Morissey who acted as an interface and convenor for the artists and to Nigel Smith (Director 2021 – present) and Jonathan Bagger (Director 2014 – 2020) for supporting the project from the TRIUMF side and to Ingrid Koenig and Randy Lee Cutler who organized and facilitated LOoW from the artists’ side.
Now, for the nits
“Co-thought” is mentioned a number of times. What is it? According to my searches, it has something to do with gestures. Here’s one of the few reference I could find for co-thought,
Co-thought and co-speech gestures are generated by the same action generation process by Mingyuan Chu and Sotaro Kita. Exp Psychol Learn Mem Cogn. 2016 Feb;42(2):257-70. doi: 10.1037/xlm0000168. Epub 2015 Aug 3.
Abstract
People spontaneously gesture when they speak (co-speech gestures) and when they solve problems silently (co-thought gestures) [emphasis mine]. In this study, we first explored the relationship between these 2 types of gestures and found that individuals who produced co-thought gestures more frequently also produced co-speech gestures more frequently (Experiments 1 and 2). This suggests that the 2 types of gestures are generated from the same process. We then investigated whether both types of gestures can be generated from the representational use of the action generation process that also generates purposeful actions that have a direct physical impact on the world, such as manipulating an object or locomotion (the action generation hypothesis). To this end, we examined the effect of object affordances on the production of both types of gestures (Experiments 3 and 4). We found that individuals produced co-thought and co-speech gestures more often when the stimulus objects afforded action (objects with a smooth surface) than when they did not (objects with a spiky surface). These results support the action generation hypothesis for representational gestures. However, our findings are incompatible with the hypothesis that co-speech representational gestures are solely generated from the speech production process (the speech production hypothesis).
It would have been nice if Koenig and Cutler had noted they were borrowing a word ot coining a word and explaining how it was being used in the LOoW context.
Fruit, passports, and fishing trips
The editors/writers use the words or variants, metaphor, poetry, and analogy with great abandon.
“Fruitful bridge” (top of page) and “fruitful match-ups” (bottom of page) on p. 18 seemed a bit excessive as did the “metaphorical passport” on p. 5.
I choked a bit over this on p. 19, “… these artist/scientist interactions can be seen as ‘procedural metaphors’ that enact a thought experiment … .” Procedural metaphor? It seems a bit of a stretch.
A last example and it’s a pair: “metaphorical fishing trips whereby artist and scientists received whatever they might reel in …” on p. 42 (emphases mine). Fishing trips are mentioned in a later essay too, one of the few times there’s some sort of follow through on an analogy.
Maybe someone who wasn’t involved with the project should have taken a look at the text before it was sent to the printer.
Using the words, poetry, metaphor, and analogy can be tricky and, I want to emphasize that in my opinion, those words were not often put to good use in this book.
Moving on, arts and sciences together have a longstanding history.
*ETA October 3, 2023: Ooops! I had a comment about the use of the word ‘passports’ in the book but somewhere in all my edits, I cut it out. (huff)*
Poetry and physics
One of the giants of 19th century physics, James Clerk Maxwell was also known for his poetry. and some of the most evocative (poetic) text in the LOoW book can be found in the quotes from various physicists of the 20th century. The link between physicist and poetry is explicit in a September 17, 2018 posting (12 poignant poems (and one bizarre limerick) written by physicists about physics) by Colin Hunter for the Perimeter Institute for Theoretical Physics in Waterloo, Canada.
Going back further, there’s De rerum natura, a poem in six books, by Lucretius ((c. 99 BCE– c. 55 BCE). Amongst many other philosophical concerns (e.g., the nature of mind and soul, etc.), Lucretius also discussed atomism (“… a natural philosophy proposing that the physical universe is composed of fundamental indivisible components known as atoms; from the Atomism Wikipedia entry). So, poetry and physics have a long history.
Leaving aside Derksen’s diagram/poem, there’s a dearth of poetry in the book except for a suite of seven poems from TRIUMF physicist and professor at UBC, Jess Brewer following his “Emergence, Free Will and Magic” essay,
Emergence / An extremely brief history of one universe, expressed as a series of science fiction poems by Jess H. Brewer, June 29, 2019
Inspired by Dyson Freeman’s delightful lecture series , “Time Without End: Physics and Biology in an Open Universe,” Reviews of Modern Physics (51) 1979
1. Bang Why not? For reasons known only to itself, the universe begins The quantum foam of spacetime seethes with effortless energies, entering and exiting this continuum with a turbulent intensity transcending the superficially smooth expanding cosmos and yet it kens the glacial passage of “time”, because it waits. And kens the vast reaches of “space”, because it watches, Its own experiences has taught it that from each iteration of complexity, awareness will emerge.
… [p. 149]
My thanks to Brewer for the poetry and magic and my apologies for any mistakes I’ve introduced into his piece. I was trying to be especially careful with the punctuation as that can make quite a difference to how a piece is read.
While Muriel Rukeyser is not a physicist at TRIUMF or, indeed, alive, one of her poems leads the essay “Leaning into Language or the Universe is Made of Stories,” by Randy Lee Cutler and Ingrid Koenig,
Time comes into it Say it. Say it. The universe is made of stories, not of atoms.. —Muriel Ruykeyser, Speed of Darkness, 1968
Before getting into the response that physicist, David Morrissey, had to the poem, here’s a little about the poet, from the Poetry Foundation’s Muriel Ruykeyser (1913-1980) webpage,
Muriel Rukeyser was a poet, playwright, biographer, children’s book author, and political activist. Indeed, for Rukeyser, these activities and forms of expression were linked. …
…
One of Rukeyser’s intentions behind writing biographies of nonliterary persons was to find a meeting place between science and poetry. [emphasis mine] In an analysis of Rukeyser’s The Life of Poetry, Virginia Terris argued that Rukeyser believed that in the West, poetry and science are wrongly considered to be in opposition to one another. Thus, writes Terris, “Rukeyser [set] forth her theoretical acceptance of science … [and pointed] out the many parallels between [poetry and science]—unity within themselves, symbolic language, selectivity, the use of the imagination in formulating concepts and in execution. [emphasis mine] Both, she believe[d], ultimately contribute to one another.”
…
Rokeyser’s poem raised a few questions. Is her poem a story? Or, is she using symbolic language, the poem, to poke fun at stories and atoms? Is she suggesting that atoms are really stories? I found the poem evocative especially with where it was placed in the book.
Morrissey takes a prosaic approach, from the essay “Leaning into Language or the Universe is Made of Stories,”
… [in response to Rukeyser’s claim about stories] Morrissey responded stating that “scientific theories are stories—but how we evaluate stories is important—they need to be true, but they do probe, and some are more popular than others, especially theories that we can’t measure.” He surprised us further when he said that wrong stories can also be useful—they may have elements in them that turn out to be useful for future research. … [pp. 205-6]
In general and throughout this project, it seems as if they (artists and physicists) tried but, for the most part, were never quite able to articulate in poetic, metaphoric, and analogical forms. They tended to fall back onto their preferred modes of scientific notations, prosaic language, and artworks.
Both sides of the knife blade cut
Everybody does it. Poets, academics, artists, scientists, etc. we all appropriate ideas and language, sometimes without understanding them very well. Take this for example, from the Canadian Broadcasting’s (CBC) Books “Elementary Particles” August 16, 2023 webpage,
Elementary Particles by Sneha Madhavan-Reese
A poetry collection about family history and scientific exploration
Through keen, quiet observation, Sneha Madhavan-Reese’s evocative new collection takes us from the wide expanse of rural India to the minute map of Michigan we carry on the palms of our hands. These poems contemplate ancestral language, the wonder and uncertainty of scientific discovery, the resilience of a dung beetle, the fleeting existence of frost flowers on the Arctic Ocean.
The collection is full of familiar characters, from Rosa Parks to Seamus Heaney to Corporal Nathan Cirillo, anchoring it in specific moments in time and place, but has the universality that comes from exploring the complex relationship between a child and her immigrant parents, and in turn, a mother and her children. Elementary Particles examines the building blocks of a life — the personal, family, and planetary histories, transformations, and losses we all experience. (From Brick Books)
Sneha Madhavan-Reese is a writer currently based in Ottawa. In 2015 she received Arc Poetry Magazine’s Diana Brebner Prize and was shortlisted for the Montreal International Poetry Prize. Her previous poetry collection is called Observing the Moon
As you can see, there’s no substantive mention of physics in this book description—it’s just a title. Puzzling since there’s this about the author on Asian Heritage Canada’s Sneha Madhavan-Reese webpage
Sneha Madhavan-Reese’s award winning poetry has been widely published in literary magazines in North America and Australia. She earned a bachelor’s degree in mechanical engineering from MIT in 2000, and a master’s degree in mechanical engineering from the University of Michigan in 2002. Madhavan-Reese currently lives in Ottawa, Ontario. [emphases mine]
It seems the mechanical engineer did not write up her book blurb because even though the poet’s scientific specialty is not physics as such, I’d expect a better description.
In the end, it seems art and science or poetry and science (in this case, physics) sells.
Alchemy, beauty, and Marx’s surprise connection to atomism
It was unexpected to see a TRIUMF physicist reference alchemy. The physicists haven’t turned lead into gold but they have changed one element into another. If memory holds it was one metallic atom being changed into another type of metallic atom. (Having had to return the book to the library, memory has serve.)
The few references to alchemy that I’ve stumbled across elsewhere in my readings of assorted science topics are derogatory, hence the surprise. Things may be changing; Princeton University Press published a November 7, 2018 posting by author William R. Newman about Newton and alchemy. First, here’s a bit about William Newman,
William R. Newman is Distinguished Professor and Ruth N. Halls Professor in the Department of History and Philosophy of Science and Medicine at Indiana University. His many books include Atoms and Alchemy: Chymistry and the Experimental Origins of the Scientific Revolution and Promethean Ambitions: Alchemy and the Quest to Perfect Nature. He lives in Bloomington, Indiana.
People often say that Isaac Newton was not only a great physicist, but also an alchemist. This seems astonishing, given his huge role in the development of science. Is it true, and if so, what is the evidence for it?
WN: The astonishment that Newton was an alchemist stems mostly from the derisive opinion that many moderns hold of alchemy [emphasis mine]. How could the man who discovered the law of universal gravitation, who co-invented calculus, and who was the first to realize the compound nature of white light also engage in the seeming pseudo-science of alchemy? There are many ways to answer this question, but the first thing is to consider the evidence of Newton’s alchemical undertaking. We now know that at least a million words in Newton’s hand survive in which he addresses alchemical themes. Much of this material has been edited in the last decade, and is available on the Chymistry of Isaac Newton site at www.chymistry.org. Newton wrote synopses of alchemical texts, analyzed their content in the form of reading notes and commentaries, composed florilegia or anthologies made up of snippets from his sources, kept experimental laboratory notebooks that recorded his alchemical research over a period of decades, and even put together a succession of concordances called the Index chemicus in which he compared the sayings of different authors to one another. The extent of his dedication to alchemy was almost unprecedented. Newton was not just an alchemist, he was an alchemist’s alchemist.
…
Beauty
The ‘beauty’ essay by Ingrid Koenig was also a surprise. Beauty seems to be anathema to contemporary artists. I wrote this in an August 23, 2016 posting (Georgina Lohan, Bharti Kher, and Pablo Picasso: the beauty and the beastliness of art [in Vancouver]), “It seems when it comes to contemporary art, beauty is transgressive.”
Koenig describes it as irrelevant for contemporary artists and yet, beauty is an important attribute to physicists. Her thoughts on beauty in visual art and in physics were a welcome addition to the book.
Marx’s connection to atomism
This will take a minute.
De rerum natura, a six-volume poem by Lucretius (mentioned under the Poetry and physics subhead of this posting), helped to establish the concept of atomism. As it turns out, Lucretius got the idea from earlier thinkers, Epicurus and Democritus.
Karl Marx’s doctoral dissertation, which focused on Lucretius, Epicurus and more, suggests an interest in science that may have led to his desire to establish economics as a science. From Cambridge University Press’s “Approaches to Lucretius; Traditions and Innovations in Reading the De Rerum Natura,” Chapter 12 – A Tribute to a Hero: Marx’s Interpretation of Epicurus in his Dissertation,
Summary
This chapter turns to Karl Marx’s treatment of Epicureanism and Lucretius [emphasis mine] in his doctoral dissertation, and argues that the questions raised by Marx may be brought to bear on our own understanding of Epicurean philosophy, particularly in respect of a tension between determinism and individual self-consciousness in a universe governed by material causation. Following the contours of Marx’s dissertation [emphasis mine], the chapter focusses on three key topics: the difference between Democritus’ and Epicurus’ methods of philosophy; the swerve of the atom; and the so-called ‘meteors’, or heavenly bodies [emphasis mine]. Marx sought to develop Hegel’s understanding of Epicurus, in particular by elevating the principle of autonomous action to a first form of self-consciousness – a consideration largely mediated by Lucretius’ theorization of the atomic swerve and his poem’s overarching framework of liberating humans from the oppression of the gods.
Fascinating, eh? The rest of this is behind a paywall. For the interested, here’s a citation and link for the book,
Approaches to Lucretius; Traditions and Innovations in Reading the De Rerum Natura Edited by Donncha O’Rourke, University of Edinburgh
Publisher: Cambridge University Press Online publication date: June 2020 Print publication year: 2020 Online ISBN: 9781108379854
It’s a little surprising Derksen doesn’t mention the connection in his essay.
Finally
It’s an interesting book if not an easy one. (By the way, I wish they’d included an index.) You can get a preview of some of the artwork in the January 6, 2020 article on the Canadian Art Magazine website.
I can’t rid myself of the feeling that LOoW (the book) is meant to function as a ‘proof of concept’ for someone wanting to start an art/science department or programme at the Emily Carr University of Art + Design, perhaps jointly with the University of British Columbia. It is highly unusual to see this sort of material in anything other than a research journal or as a final summary to the granting agency.
Should starting an art/science programme be the intention, I hope they are successful in getting such it together and, in the meantime, thank you to the physicists and artists for their work.
We should all ‘lean out of windows’ on occasion and, if it means, falling or encountering ‘dangerous, uncomfortable ideas’ then, that’s alright too.
it’s not often you see the word ‘colossal’ in a science news release but it seems these Danish researchers are very excited about their breakthrough. From a January 26, 2023 news item on Nanowerk,
In a new breakthrough, researchers at the University of Copenhagen, in collaboration with Ruhr University Bochum, have solved a problem that has caused quantum researchers headaches for years. The researchers can now control two quantum light sources rather than one. Trivial as it may seem to those uninitiated in quantum, this colossal breakthrough allows researchers to create a phenomenon known as quantum mechanical entanglement. This in turn, opens new doors for companies and others to exploit the technology commercially.
Going from one to two is a minor feat in most contexts. But in the world of quantum physics, doing so is crucial. For years, researchers around the world have strived to develop stable quantum light sources and achieve the phenomenon known as quantum mechanical entanglement – a phenomenon, with nearly sci-fi-like properties, where two light sources can affect each other instantly and potentially across large geographic distances. Entanglement is the very basis of quantum networks and central to the development of an efficient quantum computer.
Today [January 26, 2023], researchers from the Niels Bohr Institute published a new result in the highly esteemed journal Science, in which they succeeded in doing just that. According to Professor Peter Lodahl, one of the researchers behind the result, it is a crucial step in the effort to take the development of quantum technology to the next level and to “quantize” society’s computers, encryption and the internet.
“We can now control two quantum light sources and connect them to each other. It might not sound like much, but it’s a major advancement and builds upon the past 20 years of work. By doing so, we’ve revealed the key to scaling up the technology, which is crucial for the most ground-breaking of quantum hardware applications,” says Professor Peter Lodahl, who has conducted research the area since 2001.
The magic all happens in a so-called nanochip – which is not much larger than the diameter of a human hair – that the researchers also developed in recent years.
Quantum sources overtake the world’s most powerful computer
Peter Lodahl’s group is working with a type of quantum technology that uses light particles, called photons, as micro transporters to move quantum information about.
While Lodahl’s group is a leader in this discipline of quantum physics, they have only been able to control one light source at a time until now. This is because light sources are extraordinarily sensitive to outside “noise”, making them very difficult to copy. In their new result, the research group succeeded in creating two identical quantum light sources rather than just one.
“Entanglement means that by controlling one light source, you immediately affect the other. This makes it possible to create a whole network of entangled quantum light sources, all of which interact with one another, and which you can get to perform quantum bit operations in the same way as bits in a regular computer, only much more powerfully,” explains postdoc Alexey Tiranov, the article’s lead author.
This is because a quantum bit can be both a 1 and 0 at the same time, which results in processing power that is unattainable using today’s computer technology. According to Professor Lodahl, just 100 photons emitted from a single quantum light source will contain more information than the world’s largest supercomputer can process.
By using 20-30 entangled quantum light sources, there is the potential to build a universal error-corrected quantum computer – the ultimate “holy grail” for quantum technology, that large IT companies are now pumping many billions into.
Other actors will build upon the research
According to Lodahl, the biggest challenge has been to go from controlling one to two quantum light sources. Among other things, this has made it necessary for researchers to develop extremely quiet nanochips and have precise control over each light source.
With the new research breakthrough, the fundamental quantum physics research is now in place. Now it is time for other actors to take the researchers’ work and use it in their quests to deploy quantum physics in a range of technologies including computers, the internet and encryption.
“It is too expensive for a university to build a setup where we control 15-20 quantum light sources. So, now that we have contributed to understanding the fundamental quantum physics and taken the first step along the way, scaling up further is very much a technological task,” says Professor Lodahl.
The research was conducted at the Danish National Research Foundation’s “Center of Excellence for Hybrid Quantum Networks (Hy-Q)” and is a collaboration between Ruhr University Bochum in Germany and the the University of Copenhagen’s Niels Bohr Institute.
Here’s a link to and a citation for this colossal research,
Collective super- and subradiant dynamics between distant optical quantum emitters by Alexey Tiranov, Vasiliki Angelopoulou, Cornelis Jacobus van Diepen, Björn Schrinski, Oliver August Dall’Alba Sandberg, Ying Wang, Leonardo Midolo, Sven Scholz, Andreas Dirk Wieck, Arne Ludwig, Anders Søndberg Sørensen, and Peter Lodahl. Science 26 Jan 2023 Vol 379, Issue 6630 pp. 389-393 DOI: 10.1126/science.ade9324
In early October 2022, Alain Aspect, John Clauser and Anton Zeilinger were jointly awarded the 2022 Nobel Prize in Physics for work each scientist performed independently of the others.
Alain Aspect Institut d’Optique Graduate School – Université Paris- Saclay and École Polytechnique, Palaiseau, France
John F. Clauser J.F. Clauser & Assoc., Walnut Creek, CA, USA
Anton Zeilinger University of Vienna, Austria
“for experiments with entangled photons, establishing the violation of Bell inequalities and pioneering quantum information science”
Entangled states – from theory to technology
Alain Aspect, John Clauser and Anton Zeilinger have each conducted groundbreaking experiments using entangled quantum states, where two particles behave like a single unit even when they are separated. Their results have cleared the way for new technology based upon quantum information.
The ineffable effects of quantum mechanics are starting to find applications. There is now a large field of research that includes quantum computers, quantum networks and secure quantum encrypted communication.
One key factor in this development is how quantum mechanics allows two or more particles to exist in what is called an entangled state. What happens to one of the particles in an entangled pair determines what happens to the other particle, even if they are far apart.
For a long time, the question was whether the correlation was because the particles in an entangled pair contained hidden variables, instructions that tell them which result they should give in an experiment. In the 1960s, John Stewart Bell developed the mathematical inequality that is named after him. This states that if there are hidden variables, the correlation between the results of a large number of measurements will never exceed a certain value. However, quantum mechanics predicts that a certain type of experiment will violate Bell’s inequality, thus resulting in a stronger correlation than would otherwise be possible.
John Clauser developed John Bell’s ideas, leading to a practical experiment. When he took the measurements, they supported quantum mechanics by clearly violating a Bell inequality. This means that quantum mechanics cannot be replaced by a theory that uses hidden variables.
Some loopholes remained after John Clauser’s experiment. Alain Aspect developed the setup, using it in a way that closed an important loophole. He was able to switch the measurement settings after an entangled pair had left its source, so the setting that existed when they were emitted could not affect the result.
Using refined tools and long series of experiments, Anton Zeilinger started to use entangled quantum states. Among other things, his research group has demonstrated a phenomenon called quantum teleportation, which makes it possible to move a quantum state from one particle to one at a distance.
“It has become increasingly clear that a new kind of quantum technology is emerging. We can see that the laureates’ work with entangled states is of great importance, even beyond the fundamental questions about the interpretation of quantum mechanics,”says Anders Irbäck, Chair of the Nobel Committee for Physics.
There are some practical applications for their work on establishing quantum entanglement as Dr. Nicholas Peters, University of Tennessee and Oak Ridge National Laboratory (ORNL), explains in his October 7, 2022 essay for The Conversation,
Unhackable communications devices, high-precision GPS and high-resolution medical imaging all have something in common. These technologies—some under development and some already on the market all rely on the non-intuitive quantum phenomenon of entanglement.
Two quantum particles, like pairs of atoms or photons, can become entangled. That means a property of one particle is linked to a property of the other, and a change to one particle instantly affects the other particle, regardless of how far apart they are. This correlation is a key resource in quantum information technologies.
For the most part, quantum entanglement is still a subject of physics research, but it’s also a component of commercially available technologies, and it plays a starring role in the emerging quantum information processing industry.
…
Quantum entanglement is a critical element of quantum information processing, and photonic entanglement of the type pioneered by the Nobel laureates is crucial for transmitting quantum information. Quantum entanglement can be used to build large-scale quantum communications networks.
On a path toward long-distance quantum networks, Jian-Wei Pan, one of Zeilinger’s former students, and colleagues demonstrated entanglement distribution to two locations separated by 764 miles (1,203 km) on Earth via satellite transmission. However, direct transmission rates of quantum information are limited due to loss, meaning too many photons get absorbed by matter in transit so not enough reach the destination.
Entanglement is critical for solving this roadblock, through the nascent technology of quantum repeaters. An important milestone for early quantum repeaters, called entanglement swapping, was demonstrated by Zeilinger and colleagues in 1998. Entanglement swapping links one each of two pairs of entangled photons, thereby entangling the two initially independent photons, which can be far apart from each other.
…
Perhaps the most well known quantum communications application is Quantum Key Distribution (QKD), which allows someone to securely distribute encryption keys. If those keys are stored properly, they will be secure, even from future powerful, code-breaking quantum computers.
…
I don’t usually embed videos that are longer than 5 mins. but this one has a good explanation of cryptography (both classical and quantum),
The video host, Physics Girl (website), is also known as Dianna Cowern.
I wonder if there’s going to be a rush to fund and commercialize more quantum physics projects. There’s certainly an upsurge in activity locally and in Canada (I assume the same is true elsewhere) as my July 26, 2022 posting “Quantum Mechanics & Gravity conference (August 15 – 19, 2022) launches Vancouver (Canada)-based Quantum Gravity Institute and more” makes clear.
A May 15, 2020 news item on Nanowerk provides context for an announcement of a research breakthrough on quantum entanglement,
Quantum entanglement is a process by which microscopic objects like electrons or atoms lose their individuality to become better coordinated with each other. Entanglement is at the heart of quantum technologies that promise large advances in computing, communications and sensing, for example detecting gravitational waves.
Entangled states are famously fragile: in most cases even a tiny disturbance will undo the entanglement. For this reason, current quantum technologies take great pains to isolate the microscopic systems they work with, and typically operate at temperatures close to absolute zero.
The ICFO [Institute of Photonic Sciences; Spain] team, in contrast, heated a collection of atoms to 450 Kelvin, millions of times hotter than most atoms used for quantum technology. Moreover, the individual atoms were anything but isolated; they collided with each other every few microseconds, and each collision set their electrons spinning in random directions.
The researchers used a laser to monitor the magnetization of this hot, chaotic gas. The magnetization is caused by the spinning electrons in the atoms, and provides a way to study the effect of the collisions and to detect entanglement. What the researchers observed was an enormous number of entangled atoms – about 100 times more than ever before observed. They also saw that the entanglement is non-local – it involves atoms that are not close to each other. Between any two entangled atoms there are thousands of other atoms, many of which are entangled with still other atoms, in a giant, hot and messy entangled state.
What they also saw, as Jia Kong, first author of the study, recalls, “is that if we stop the measurement, the entanglement remains for about 1 millisecond, which means that 1000 times per second a new batch of 15 trillion atoms is being entangled. And you must think that 1 ms is a very long time for the atoms, long enough for about fifty random collisions to occur. This clearly shows that the entanglement is not destroyed by these random events. This is maybe the most surprising result of the work”.
The observation of this hot and messy entangled state paves the way for ultra-sensitive magnetic field detection. For example, in magnetoencephalography (magnetic brain imaging), a new generation of sensors uses these same hot, high-density atomic gases to detect the magnetic fields produced by brain activity. The new results show that entanglement can improve the sensitivity of this technique, which has applications in fundamental brain science and neurosurgery.
As ICREA [Catalan Institution for Research and Advanced Studies] Prof. at ICFO Morgan Mitchell states, “this result is surprising, a real departure from what everyone expects of entanglement.” He adds “we hope that this kind of giant entangled state will lead to better sensor performance in applications ranging from brain imaging to self-driving cars to searches for dark matter
A Spin Singlet and QND
A spin singlet is one form of entanglement where the multiple particles’ spins–their intrinsic angular momentum–add up to 0, meaning the system has zero total angular momentum. In this study, the researchers applied quantum non-demolition (QND) measurement to extract the information of the spin of trillions of atoms. The technique passes laser photons with a specific energy through the gas of atoms. These photons with this precise energy do not excite the atoms but they themselves are affected by the encounter. The atoms’ spins act as magnets to rotate the polarization of the light. By measuring how much the photons’ polarization has changed after passing through the cloud, the researchers are able to determine the total spin of the gas of atoms.
The SERF regime
Current magnetometers operate in a regime that is called SERF, far away from the near absolute zero temperatures that researchers typically employ to study entangled atoms. In this regime, any atom experiences many random collisions with other neighbouring atoms, making collisions the most important effect on the state of the atom. In addition, because they are in a hot medium rather than an ultracold one, the collisions rapidly randomize the spin of the electrons in any given atom. The experiment shows, surprisingly, that this kind of disturbance does not break the entangled states, it merely passes the entanglement from one atom to another.
Originally, the plan was to produce some sort of a Canadian science culture roundup for 2019 but it came to my attention that 2019 was also an end-of-decade year (sometimes I miss the obvious). I’ll do my best to make this snappy but it is a review (more or less) of the last 10 years (roughly) and with regard to science culture in Canada, I’m giving the term a wide interpretation while avoiding (for the most part) mention of traditional science communication/outreach efforts such as university rresearch, academic publishing, academic conferences, and the like.
Since writing that opening paragraph in late December 2019, COVID-19 took over the world and this review seemed irrelevant for a while but as time passed, Iit occurred to me it might serve as a reminder of past good times and as a hope for the future.
Having started this blog in 2008, I’ve had the good fortune to observe a big increase in the number and range of science outreach/communication/culture initiatives, projects, festivals, etc. It’s tempting to describe it as an explosion of popular interest but I have no idea if this is true. I spend much of my time searching out and writing up this kind of work in addition to the emerging science and technology that I follow and my perception is most likely skewed by my pursuits. What i can say is that in 2019 there was more of everything to do with science culture/outreach/communication than there was when I started in 2008.
Coincidentally, I wrote a three-part series about science communication (including science outreach/culture projects) in Canada in Sept. 2009, just months before the start of this decade. In retrospect, the series is sprawling everywhere and it looks to me like I was desperately trying to make something look bigger than it actually was.
I’m looking at the more formal aspects of science communication and so onto mainstream media and education. This is the saddest section but don’t worry it gets better as it goes on.
Mainstream Media
As I note in the following subsection, there are fewer science writers employed by mainstream media, especially in Canada. The only science writer (that I know of) who’s currently employed by a newspaper is Ivan Semeniuk. for the Globe and Mail.
Margaret Munro who was the science writer for PostMedia (publisher of most newspaper dailies in Canada) is now a freelancer. Kate Lunau, a health and science journalist for Maclean’s Magazine (Canada) until 2016 and then Motherboard/VICE (US online publication) until March 2019 now publishes her own newsletter.
Daily Planet, which was a long running science programme (under various names since 1995) on Discovery Channel Canada and which inspired iterations in other countries, was cancelled in 2018 but there is still a Twitter feed being kept up to date and a webpage with access to archived programmes.
The Canadian Broadcasting Corporation (CBC) programmes, Spark for technology and Quirks & Quarks for science on the radio side and the Nature of Things for science, wildlife, and technology on television carry on year after year and decade after decade.
A more recent addition (2019?) to the CBC lineup is a podcast that touches on science and other topics, Tai Asks Why? According to the programme’s About page, the host (Tai Poole) is in grade seven. No podcasts dated after September 2019 have been posted on Tia’s page.
Yes Magazine for children and Seed magazine (for adults) have both died since 2009. On a happier note, Canadian children’s science magazines are easier to find these days either because I got lucky on my search and/or because there are more of them to find.
Thank you to helpwevegotkids.com for their 10 Awesome Magazines for Canadian Kids webpage. First published in 2016, it is updated from time to time, most recently in October 2019 by Heather Camlot; it’s where I found many of these science/technology magazines (Note: I’m not sure how long these magazines have been published but they are all new to me),
Chickadee Magazine: ages 6-9 ( Every month, the Chickadee team creates a package of interactive stories, puzzles, animal features, and science experiments to educate and entertain readers.) It’s from the folks at owlkids.com
OWL Magazine: ages 9-13 (… highlight the elements of science and tech, engineering, art and math ) Also from the folks at owlkids.com
AdventureBox: ages 6 – 9 (… nature with beautiful photographs and fascinating scientific information … Hilarious and adventurous comic-strips, games and quizzes … An audio CD every 2 months) Also from the folks at owlkids.com
DiscoveryBox: ages 9 – 12 ( … Animals and nature, with spectacular photographs … Fascinating scientific topics, with clear explanations and experiments to carry out …) Also from the folks at owlkids.com BTW, I was not able to find out much about the Owl Kids organization.
WILD magazine ( … jam-packed with fun wildlife stories, games and pictures for youngsters of all ages. It’s a great way to get the children in your life engaged in nature and share your passion for the outdoors. Published 6 times per year) From the folks at the Canadian Wildlife Federation (enough said).
Bazoof! (… suited for ages 7-12 … nutrition, personal care, fitness, healthy lifestyles, character development, eco-education—all in a creative and zany style! Filled with short stories, comics, recipes, puzzles, games, crafts, jokes, riddles, pet care, interviews, healthy snacks, sports, true stories, fun facts, prizes and more!) Bazoof! is being brought to you by the team responsible for Zamoof! You might want to read their About page. That’s all I can dig up.
Brainspace (an augmented reality magazine for kids 8 – 14) As best I can determine they are still ‘publishing’ their interactive magazine but they make finding information about themselves or their organization a little challenging. It’s published in Ontario and its publisher Nicky Middleton had this in her LinkedIn profile: “Publisher of Brainspace interactive magazine for kids 8-12. Creating augmented reality content for teaching resources in partnership with Brock University, District School Board of Niagara.”
One more thing regarding mainstream media
While there are fewer science journalists being employed, there’s still a need for science writing and journalism. The Science Media Centre of Canada (SMCC) opened in 2010 (from its Wikipedia entry),
… to serve journalists with accurate information on scientific matters. The centre has a Research Advisory Panel of 20 Canadian scientists who will make their expertise available in a simple and understandable manner. In order to secure objectivity, the centre has an Editorial Advisory Committee of eight journalists. The centre is bilingual.
As of January 2020, the SMCC is still in operation.
Education
It’s been up and down. Banff Centre (for Arts and Creativity) no longer runs a Science Communication programme in the summer but Laurentian University, which in 2009 seemed to offer a single module for one programme, now offers a Masters of Science Communication or a Science Communication Graduate Diploma.
Mount St. Vincent University in Nova Scotia offers a minor in Science Communication (scroll down). I gather it’s a new minor.
The University of British Columbia’s Journalism School (Vancouver) no longer has a Science Journalism Research Group nor does Concordia University (Montréal) have its Science Journalism Project. I have checked both journalism schools and cannot find any indication there is a science programme or specific science courses of any kind for journalists or other communicators but I didn’t spend a lot of time digging. Interestingly, the chair, David Secko, of Concordia’s journalism programme is a science journalist himself and a member of the Editorial Advisory Committee of the Science Media Centre of Canada.
The lack of science journalism programmes in Canada seems to reflect on overall lack of science journalism. It’s predictable given that the newspapers that once harboured science journalists have trimmed and continue to trim back their staffs.
Miscellaneous
Science centres, museums, and the like are considered part of the informal science community with Makerspaces being a new addition. For the most part, their target audience is children but they are increasingly (since 2010, I believe) offering events aimed at adults. The Canadian Association of Science Centres (CASC) describes itself and its membership this way (from the CASC About Us webpage),
CASC members are a diverse group of organisations that support informal learning of science, technology and nature. Our common bond is that we offer creative programming and exhibitions for visitors that inspire a drive to learn, create, and innovate.
If you are a member of a Science Centres, Museums, Aquariums, Planetariums and Makerspaces [these are a 2010s phenomenon] you could benefit from our reciprocal admission agreement. Not all CASC Members are participants in the Reciprocal Admissions Agreement. Click here for more information.
You can find a full list of their members including the Ingenium museums (the federal consortium of national Canadian science museums), the Saskatchewan Science Centre, the Nunavut Research Institute, Science East, and more, here.
I’m calling what follows ‘truly informal science culture’.
Science: the informal (sometimes cultural) scene
When I first started (this blog) there was one informal science get-together (that I knew of locally) and that was Vancouver Café Scientifque and its monthly events, which are still ongoing. You can find our more about the parent organization, which was started in Leeds, England in 1998. Other Canadian cities listed as having a Café Scientifique: Ottawa, Victoria, Mississauga, and Saskatoon.
Now onto the music, the dance, and more
Sing a song of science
Baba Brinkman is well known for his science raps. The rapper and playwright (from British Columbia) lives in New York City these days with his wife and sometime performance collaborator, neuroscientist Dr. Heather Berlin and their two children (see his Wikipedia entry for more), he is still Canadian (I think).
He got his start rapping science in 2008 when I think he was still living in Vancouver (Canada) after gaining the attention of UK professor Mark Pallen who commissioned him to write a rap about evolution. The Rap Guide to Evolution premiered at the 2009 Edinburgh Fringe Festival. Here’s a video of Brinkman’s latest science rap (Data Science) posted on YouTube on October 21, 2019,
I find this one especially interesting since Brinkman’s mother is the Honourable Joyce Murray, a member of parliament and the Minister of Digital Government in Prime Minister Justin Trudeau’s latest cabinet. (My December 27, 2019 posting highlights what I believe to be the importance of the Minister of Digital Government in the context of the government’s science and technology vision. Scroll down about 25% of the way to the subhead titled “The Minister of Digital Government and a bureaucratic débacle,”) You can find out more about Baba Brinkman here.
Tim Blais of A Capella Science first attracted my notice in 2014 thanks to David Bruggeman and his Pasco Phronesis blog (btw: David, I miss your posts about science and music which are how I found out most of what I know about the Canadian science music scene).
Blais (who has a master’s degree in physics from McGill University in Québec) started producing his musical science videos in 2012. I featured one of his earliest efforts (and one of my favourites, Rolling in the Higgs [Adele parody]) in my July 18, 2014 posting.
Dating back to 2012. The Institute of Quantum Computing at the University of Waterloo held two performances of Quantum: Music at the Frontier of Science. Raymond Laflamme, then director of the institute, wrote a September 20, 2012 article (The Quantum Symphony: A Cultural Entanglement) about the performances. You can see a video (15 mins., 45 secs.,) of the February 2012 performances here.
More recently, the Life Sciences Institute at the University of British Columbia (UBC) hosted a performance of Sounds and Science – Vienna Meets Vancouver in late 2019. I covered it in a November 12, 2019 posting (scroll down to the Sounds and Science subheading). The story about how the series, which has its home base in Vienna, started is fascinating. The sold out Vancouver performance was a combination of music and lecture featuring the Vienna Philharmonic and UBC researchers. According to this Sounds and Science UBC update,
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For those who missed this exceptional evening, JoyTV and its CARPe Diem show will be producing an episode focusing on the concert, to be aired in February, 2020 [emphasis mine].
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There is another way to look at musical science and that’s to consider the science of music which is what they do at the Large Interactive Virtual Environment Laboratory (LIVELab) at McMaster University (Hamilton, Ontario, Canada). it’s “a research concert hall. It functions as both a high-tech laboratory and theatre, opening up tremendous opportunities for research and investigation”, you can read more about it in my November 29, 2019 posting.
One last thing, there is data sonification which means finding a way to turn data into music or a sound which can more or less be defined as musical. There may be other data sonification projects and presentations in Canada but these are the ones I’ve tripped across (Note: Some links have bee removed),
Songs of the Ottawa From the website: “Songs of the Ottawa” is the Master’s Research Project of Cristina Wood, under the co-supervision of Dr. Joanna Dean and Dr. Shawn Graham. She completed her Master’s of Arts in Public History with a Specialization in Digital Humanities at Carleton University in spring 2019. She will continue her explorations of the Ottawa River in the Ph.D. program at York University [fall 2020]. Be in touch with Cristina on Twitter or send an email to hello [at] cristinawood [dot] ca.”
The Art of Data Sonification (This January 2019 workshop at Inter/Access in Toronto is over.) From the website: “Learn how to turn data into sound! Dan Tapper will teach participants how to apply different data sonification techniques, collect and produce a variety of sonifications, and how to creatively use these sonifications in their own work. The workshop will move from looking at data sonification through the lens of Dan Tapper’s work sonifying data sets from NASA, to collecting, cleaning and using your own data for artistic creation. Participants will work with pre-gathered and cleaned data sets before collecting and working with personal data and online data sets. Tools will be provided by Tapper created in Pure Data and Processing, as well as versions for Max/MSP users. A particular focus will be placed on how to use data sets and the created sonifications in creative practice – moving beyond quantitative sonic representations to richer material. “
Sonification: Making Data Sound (This September 2019 workshop at the Peter Wall Institute for Advanced Studies at the University of British Columbia is also over.) From the website: ” Computers and music have been mingling their intimate secrets for over 50 years. These two worlds evolve in tandem, and where they intersect they spawn practices that are entirely novel. One of these is “sonification,” turning raw data into sounds and sonic streams to discover new musical relationships within the dataset. This is similar to data visualization, a strategy that reveals new insights from data when it is made for the eye to perceive as graphs or animations. A key advantage with sonification is sound’s ability to present trends and details simultaneously at multiple time scales, allowing us to absorb and integrate information in the same way we listen to music. In this workshop, Chris Chafe will lead a discussion of the practice and application of sonification in a wide array of disciplines, drawing on his own extensive experience in this field.”
I have been looking for data sonification projects in Canada for years. It’s amazing to me that all of this sprung up in the last year of this decade. If there’s more, please do let me know in the Comments section.
Science blogging in Canada
The big news for the decade was the founding and launch of Science Borealis, a Canadian science blog aggregator in 2013. Assuming I counted right in December 2019, there are 146 blogs. These are not all independent bloggers, many institutional blogs are included. Also, I’m not sure how active some of these blogs are. Regardless, that’s a pretty stunning number especially when I consider that my annual Canadian blog roundup from 2010 -2012 would have boasted 20 – 30 Canadian science blogs at most.
I’m not sure why ASAP Science (Michael Moffit and Gregory Brown) isn’t included on Science Borealis but maybe the science vloggers (video bloggers) prefer to go it alone. or they fit into another category of online science. Regardless, ASAP Science has been around since May 2012 according to their About page. In addition to the science education/information they provide, there’s music, including this Taylor Swift Acapella Parody.
One of the earliest Canadians to create a science blog,Gregor Wolbring, Associate Professor at the University of Calgary’s Cumming School of Medicine, started his in 2006. He has taken a few breaks, 2011 and August 2013 – June 2017 but he’s back at it these days. He is in a sense a progenitor for Canadian science blogging. At one time, his blog was so popular that US researchers included it in their studies on what was then ‘the blogging phenomenon’. His focus academically and on his blog is on rehabilitation and disability. This webpage on his blog is of particular interest to me: FUTUREBODY: The Future of the Body in the Light of Neurotechnology. It’s where he lists papers from himself and his colleagues’ in the ERANET NEURON ELSI/ELSA funded by the European Community. (ELSI is Ethical, Legal and Social Implications and ELSA is Ethical, Legal, and Social Aspects.)
Canada’s Favourite Science Online, a competition co-sponsored by Science Borealia and the Science Writers and Communicators of Canada (SWCC), gives a People’s Choice Award annually in two categories: blog and science site. This September 16, 2019 posting on the Science Borealis blog features the finalists in the categories and a pretty decent sampling of what available online from the Canadian science community.
Science in the City is a Canadian life sciences blog aggregator and job and event listing website. The name is an official mark of McMaster University (Ontario, Canada) and it is used and registered by STEMCELL Technologies Canada Inc. Here’s more from their AboutScienceInTheCity webpage,
As scientists ourselves, we know that science is accelerated by collaboration and connection, but that the busy, demanding lifestyle of a scientist makes this challenging. Thus, we saw the need for a central resource that connects local scientists, provides them with a platform to share their ideas, and helps them stay current with the news, events, and jobs within their local scientific community. This inspired us to launch Science in the City in our hometown of Vancouver, Canada in 2017.
Science in the City is your complete source for all the life science news and events happening in your city. The Science in the City website and weekly newsletter provide researchers and medical professionals with breaking news, in-depth articles, and insightful commentary on what is happening around them. By supplying scientists with a resource for the local news and events that affect them, Science in the City fosters learning and collaboration within scientific communities, ultimately supporting the advancement of science and medicine.
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Vancouver is our hometown, so it made sense to launch this exciting initiative in our own backyard. But we’re only getting started! We’ve launched Science in the City in Seattle and Boston, and we’re currently working on bringing Science in the City to several more scientific communities across North America and Europe!
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Do check their event listings as they range past life science to many other interesting ‘sciencish’ get togethers. For example, in early 2020 (in Vancouver) there was,
At a guess their funding comes from STEMCELL Technologies while Science Borealis was originally (not sure what the status is today) bankrolled by Canadian Science Publishing (CSP).
It’s just dance, dance, dance
Ranging from pigeon courtship to superconductivity, Canadian scientists have scored a number of wins in the Dance Your Ph.D. competition founded in 2008 according to its Wikipedia entry and held by Science Magazine and the American Association for the Advancement of Science (AAAS). The contest requires that the entrant dance either as a solo artist or as part of a troupe.
In 2018, a University of Alberta student won in the physics category and then went on to win overall. I covered it in a February 22, 2019 posting. Because I love the video, here is Pramodh Senarath Yapa with his Superconductivity: The Musical!, again,
BTW, John Bohannon who came up with the idea for the contest wrote this February 15, 2019 article about Yapa’s win for Science Magazine.
While searching for other Canadian Dance Your Ph.D. winners, I found some from the 2010 and 2011 contests. (If there are others, please do let me know in the Comments section.)
McConnell’s video did not win in its division but another Canadian student, Queen’s University (Ontario) biologist, Emma Ware won the 2011 social science division for ‘A Study of Social Interactivity Using Pigeon Courtship‘. For more about McConnell and Ware’s 2011 efforts, you can read Tyler Irving’s October 20, 2011 posting on his eponymous blog. (Side note: Irving is a Canadian science writer who started the blog in 2011 and took a five year hiatus from January 2015 to January 2020.)
Onward dance
Lesley Telford, choreographer and director of Inverso Productions based in Vancouver, seems to have started showing a dance piece inspired by Albert Einstein’s famous description of quantum entanglement as “spooky action from s a distance” in 2017.
I first wrote about it in an April 20, 2017 posting. The title, at that time, was, ‘Three Sets/Relating At A Distance; My tongue, your ear / If / Spooky Action at a Distance (phase 1‘. In 2017, Telford was artist-in-residence at the Dance Centre and TRIUMF, Canada’s national laboratory for particle and nuclear physics and accelerator-based science, both located in Vancouver.
She has continued to work with the concept and most recently her company gave performances of ‘Spooky Action’ in 2019 and will go on tour in 2020 according to her company’s homepage.
Unlike Lesley Telford who has a single science-inspired piece, Blue Ceilingdance in Toronto, is organized around the idea of art (dance) and science according to the company’s About page,
Blue Ceiling dance aims to pierce the soul through investigations at the intersection of art and science, and physical rigour provoked by the imagination. By peering into the mysterious corners of human experience and embodying the natural laws of the universe, we want to inspire empathy and curiosity. Through creation, production, commissioning and touring of new dance and multi-disciplinary works and through the Imaginative Body Classes, Blue Ceiling dance uses the poetry of the body and of scientific language to describe our experience of the world through the lens of poetic naturalism.
Blue Ceiling dance was founded by Lucy Rupert in 2004, as an umbrella for her creative endeavours. …
Our biggest project to date premieres January 23-26th, 2020 at The Theatre Centre [Toronto].
Using the length of time it takes light to travel from the Sun to Earth, we launch into 8 overlapping meditations on the physical behaviour of light, the metaphors of astrophysics, and the soul of cosmology, as they brush against a sense of our own mortality. What would you do with your last 8 minutes and 17 seconds before the lights go out?
Choreographed and conceived by Lucy Rupert with additional choreography by Karen Kaeja, Emma Kerson and Jane Alison McKinney, and Michael Caldwell. With text written by Hume Baugh.
The company’s repertoire is diverse and focused largely on science,
Animal Vegetable Mineral is a site-specific work with a naturalist-led hike. Exploring embodiments of each category of matter, the dancers form an ecosystem under stress, and highlight the interconnectedness of all species and our deep need for one another. Audiences explore their local environment and encounter human embodiments in an intimate performance setting.
Originally made for the High Park Nature Centre in Toronto, the piece is adaptable to different ecosystems and environments.
dead reckoning Perplexing, haunting and slightly mischievous, with choreography by Lucy Rupert and international ballet choreographer Peter Quanz. The launching point for this work of dance-theatre is Sir Ernest Shackleton’s ill-fated expedition to Antarctica in 1914 and the mysterious experiences surrounding his life-or-death situation. Three linked dances offer three views of an explorer pursued by an enigmatic “other”.
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Bye, bye ScienceOnline Vancouver
A ScienceOnline conference and community based in the United States inspired a short-lived but exciting offshoot in Vancouver. With much ado, their first event was held on April 19, 2012. As I recall, by December 2012, it had died.
The volunteers were wildly ambitious and it’s very hard to maintain the level of dynamism and technology they established on their first night. Here’s how I described the first event in my April 20, 2012 posting, ” It was a very technology-heavy event in that there was livestreaming, multiple computers and screens, references to tweeting and Storify, etc.” That’s a lot to do on a regular basis as volunteers. By Christmas 2012, ScienceOnline was gone. It was a great and I’m thankful for it.
Now onto part 2 where you’ll find the visual arts, poetry, festivals, and more.
This supremacy, refers to an engineering milestone and a October 23, 2019 news item on ScienceDaily announces the milestone has been reached,
Researchers in UC [University of California] Santa Barbara/Google scientist John Martinis’ group have made good on their claim to quantum supremacy. Using 53 entangled quantum bits (“qubits”), their Sycamore computer has taken on — and solved — a problem considered intractable for classical computers.
“A computation that would take 10,000 years on a classical supercomputer took 200 seconds on our quantum computer,” said Brooks Foxen, a graduate student researcher in the Martinis Group. “It is likely that the classical simulation time, currently estimated at 10,000 years, will be reduced by improved classical hardware and algorithms, but, since we are currently 1.5 trillion times faster, we feel comfortable laying claim to this achievement.”
The feat is outlined in a paper in the journal Nature.
The milestone comes after roughly two decades of quantum computing research conducted by Martinis and his group, from the development of a single superconducting qubit to systems including architectures of 72 and, with Sycamore, 54 qubits (one didn’t perform) that take advantage of the both awe-inspiring and bizarre properties of quantum mechanics.
“The algorithm was chosen to emphasize the strengths of the quantum computer by leveraging the natural dynamics of the device,” said Ben Chiaro, another graduate student researcher in the Martinis Group. That is, the researchers wanted to test the computer’s ability to hold and rapidly manipulate a vast amount of complex, unstructured data.
“We basically wanted to produce an entangled state involving all of our qubits as quickly as we can,” Foxen said, “and so we settled on a sequence of operations that produced a complicated superposition state that, when measured, returns bitstring with a probability determined by the specific sequence of operations used to prepare that particular superposition. The exercise, which was to verify that the circuit’s output correspond to the equence used to prepare the state, sampled the quantum circuit a million times in just a few minutes, exploring all possibilities — before the system could lose its quantum coherence.
‘A complex superposition state’
“We performed a fixed set of operations that entangles 53 qubits into a complex superposition state,” Chiaro explained. “This superposition state encodes the probability distribution. For the quantum computer, preparing this superposition state is accomplished by applying a sequence of tens of control pulses to each qubit in a matter of microseconds. We can prepare and then sample from this distribution by measuring the qubits a million times in 200 seconds.”
“For classical computers, it is much more difficult to compute the outcome of these operations because it requires computing the probability of being in any one of the 2^53 possible states, where the 53 comes from the number of qubits — the exponential scaling is why people are interested in quantum computing to begin with,” Foxen said. “This is done by matrix multiplication, which is expensive for classical computers as the matrices become large.”
According to the new paper, the researchers used a method called cross-entropy benchmarking to compare the quantum circuit’s output (a “bitstring”) to its “corresponding ideal probability computed via simulation on a classical computer” to ascertain that the quantum computer was working correctly.
“We made a lot of design choices in the development of our processor that are really advantageous,” said Chiaro. Among these advantages, he said, are the ability to experimentally tune the parameters of the individual qubits as well as their interactions.
While the experiment was chosen as a proof-of-concept for the computer, the research has resulted in a very real and valuable tool: a certified random number generator. Useful in a variety of fields, random numbers can ensure that encrypted keys can’t be guessed, or that a sample from a larger population is truly representative, leading to optimal solutions for complex problems and more robust machine learning applications. The speed with which the quantum circuit can produce its randomized bit string is so great that there is no time to analyze and “cheat” the system.
“Quantum mechanical states do things that go beyond our day-to-day experience and so have the potential to provide capabilities and application that would otherwise be unattainable,” commented Joe Incandela, UC Santa Barbara’s vice chancellor for research. “The team has demonstrated the ability to reliably create and repeatedly sample complicated quantum states involving 53 entangled elements to carry out an exercise that would take millennia to do with a classical supercomputer. This is a major accomplishment. We are at the threshold of a new era of knowledge acquisition.”
Looking ahead
With an achievement like “quantum supremacy,” it’s tempting to think that the UC Santa Barbara/Google researchers will plant their flag and rest easy. But for Foxen, Chiaro, Martinis and the rest of the UCSB/Google AI Quantum group, this is just the beginning.
“It’s kind of a continuous improvement mindset,” Foxen said. “There are always projects in the works.” In the near term, further improvements to these “noisy” qubits may enable the simulation of interesting phenomena in quantum mechanics, such as thermalization, or the vast amount of possibility in the realms of materials and chemistry.
In the long term, however, the scientists are always looking to improve coherence times, or, at the other end, to detect and fix errors, which would take many additional qubits per qubit being checked. These efforts have been running parallel to the design and build of the quantum computer itself, and ensure the researchers have a lot of work before hitting their next milestone.
“It’s been an honor and a pleasure to be associated with this team,” Chiaro said. “It’s a great collection of strong technical contributors with great leadership and the whole team really synergizes well.”
Here’s a link to and a citation for the paper,
Quantum supremacy using a programmable superconducting processor by Frank Arute, Kunal Arya, Ryan Babbush, Dave Bacon, Joseph C. Bardin, Rami Barends, Rupak Biswas, Sergio Boixo, Fernando G. S. L. Brandao, David A. Buell, Brian Burkett, Yu Chen, Zijun Chen, Ben Chiaro, Roberto Collins, William Courtney, Andrew Dunsworth, Edward Farhi, Brooks Foxen, Austin Fowler, Craig Gidney, Marissa Giustina, Rob Graff, Keith Guerin, Steve Habegger, Matthew P. Harrigan, Michael J. Hartmann, Alan Ho, Markus Hoffmann, Trent Huang, Travis S. Humble, Sergei V. Isakov, Evan Jeffrey, Zhang Jiang, Dvir Kafri, Kostyantyn Kechedzhi, Julian Kelly, Paul V. Klimov, Sergey Knysh, Alexander Korotkov, Fedor Kostritsa, David Landhuis, Mike Lindmark, Erik Lucero, Dmitry Lyakh, Salvatore Mandrà, Jarrod R. McClean, Matthew McEwen, Anthony Megrant, Xiao Mi, Kristel Michielsen, Masoud Mohseni, Josh Mutus, Ofer Naaman, Matthew Neeley, Charles Neill, Murphy Yuezhen Niu, Eric Ostby, Andre Petukhov, John C. Platt, Chris Quintana, Eleanor G. Rieffel, Pedram Roushan, Nicholas C. Rubin, Daniel Sank, Kevin J. Satzinger, Vadim Smelyanskiy, Kevin J. Sung, Matthew D. Trevithick, Amit Vainsencher, Benjamin Villalonga, Theodore White, Z. Jamie Yao, Ping Yeh, Adam Zalcman, Hartmut Neven & John M. Martinis. Nature volume 574, pages505–510 (2019) DOI: https://doi.org/10.1038/s41586-019-1666-5 Issue Date 24 October 2019
Weaving a quantum processor from light is a jaw-dropping event (as far as I’m concerned). An October 17, 2019 news item on phys.org makes the announcement,
An international team of scientists from Australia, Japan and the United States has produced a prototype of a large-scale quantum processor made of laser light.
Based on a design ten years in the making, the processor has built-in scalability that allows the number of quantum components—made out of light—to scale to extreme numbers. The research was published in Science today [October 18, 2019; Note: I cannot explain the discrepancy between the dates]].
Quantum computers promise fast solutions to hard problems, but to do this they require a large number of quantum components and must be relatively error free. Current quantum processors are still small and prone to errors. This new design provides an alternative solution, using light, to reach the scale required to eventually outperform classical computers on important problems.
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Caption: The entanglement structure of a large-scale quantum processor made of light. Credit: Shota Yokoyama 2019
“While today’s quantum processors are impressive, it isn’t clear if the current designs can be scaled up to extremely large sizes,” notes Dr Nicolas Menicucci, Chief Investigator at the Centre for Quantum Computation and Communication Technology (CQC2T) at RMIT University in Melbourne, Australia.
“Our approach starts with extreme scalability – built in from the very beginning – because the processor, called a cluster state, is made out of light.”
Using light as a quantum processor
A cluster state is a large collection of entangled quantum components that performs quantum computations when measured in a particular way.
“To be useful for real-world problems, a cluster state must be both large enough and have the right entanglement structure. In the two decades since they were proposed, all previous demonstrations of cluster states have failed on one or both of these counts,” says Dr Menicucci. “Ours is the first ever to succeed at both.”
To make the cluster state, specially designed crystals convert ordinary laser light into a type of quantum light called squeezed light, which is then weaved into a cluster state by a network of mirrors, beamsplitters and optical fibres.
The team’s design allows for a relatively small experiment to generate an immense two-dimensional cluster state with scalability built in. Although the levels of squeezing – a measure of quality – are currently too low for solving practical problems, the design is compatible with approaches to achieve state-of-the-art squeezing levels.
The team says their achievement opens up new possibilities for quantum computing with light.
“In this work, for the first time in any system, we have made a large-scale cluster state whose structure enables universal quantum computation.” Says Dr Hidehiro Yonezawa, Chief Investigator, CQC2T at UNSW Canberra. “Our experiment demonstrates that this design is feasible – and scalable.”
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The experiment was an international effort, with the design developed through collaboration by Dr Menicucci at RMIT, Dr Rafael Alexander from the University of New Mexico and UNSW Canberra researchers Dr Hidehiro Yonezawa and Dr Shota Yokoyama. A team of experimentalists at the University of Tokyo, led by Professor Akira Furusawa, performed the ground-breaking experiment.
Here’s a link to and a citation for the paper,
Generation of time-domain-multiplexed two-dimensional cluster state by Warit Asavanant, Yu Shiozawa, Shota Yokoyama, Baramee Charoensombutamon, Hiroki Emura, Rafael N. Alexander, Shuntaro Takeda, Jun-ichi Yoshikawa, Nicolas C. Menicucci, Hidehiro Yonezawa, Akira Furusawa. Science 18 Oct 2019: Vol. 366, Issue 6463, pp. 373-376 DOI: 10.1126/science.aay2645
An August 29, 2019 news item on phys.org broke the news about breaking a record for transferring quantum entanglement between matter and light ,
The quantum internet promises absolutely tap-proof communication and powerful distributed sensor networks for new science and technology. However, because quantum information cannot be copied, it is not possible to send this information over a classical network. Quantum information must be transmitted by quantum particles, and special interfaces are required for this. The Innsbruck-based experimental physicist Ben Lanyon, who was awarded the Austrian START Prize in 2015 for his research, is investigating these important intersections of a future quantum Internet.
Now his team at the Department of Experimental Physics at the University of Innsbruck and at the Institute of Quantum Optics and Quantum Information of the Austrian Academy of Sciences has achieved a record for the transfer of quantum entanglement between matter and light. For the first time, a distance of 50 kilometers was covered using fiber optic cables. “This is two orders of magnitude further than was previously possible and is a practical distance to start building inter-city quantum networks,” says Ben Lanyon.
Lanyon’s team started the experiment with a calcium atom trapped in an ion trap. Using laser beams, the researchers write a quantum state onto the ion and simultaneously excite it to emit a photon in which quantum information is stored. As a result, the quantum states of the atom and the light particle are entangled. But the challenge is to transmit the photon over fiber optic cables. “The photon emitted by the calcium ion has a wavelength of 854 nanometers and is quickly absorbed by the optical fiber”, says Ben Lanyon. His team therefore initially sends the light particle through a nonlinear crystal illuminated by a strong laser. Thereby the photon wavelength is converted to the optimal value for long-distance travel: the current telecommunications standard wavelength of 1550 nanometers. The researchers from Innsbruck then send this photon through a 50-kilometer-long optical fiber line. Their measurements show that atom and light particle are still entangled even after the wavelength conversion and this long journey.
Even greater distances in sight
As a next step, Lanyon and his team show that their methods would enable entanglement to be generated between ions 100 kilometers apart and more. Two nodes send each an entangled photon over a distance of 50 kilometers to an intersection where the light particles are measured in such a way that they lose their entanglement with the ions, which in turn would entangle them. With 100-kilometer node spacing now a possibility, one could therefore envisage building the world’s first intercity light-matter quantum network in the coming years: only a handful of trapped ion-systems would be required on the way to establish a quantum internet between Innsbruck and Vienna, for example.
Lanyon’s team is part of the Quantum Internet Alliance, an international project within the Quantum Flagship framework of the European Union. The current results have been published in the Nature journal Quantum Information. Financially supported was the research among others by the Austrian Science Fund FWF and the European Union.
Here’s a link to and a citation for the paper,
Light-matter entanglement over 50 km of optical fibre by V. Krutyanskiy, M. Meraner, J. Schupp, V. Krcmarsky, H. Hainzer & B. P. Lanyon. npj Quantum Information volume 5, Article number: 72 (2019) DOI: https://doi.org/10.1038/s41534-019-0186-3 Published: 27 August 2019
It seems sound is becoming more prominent as a means of science data communication (data sonification) and in this upcoming case, data transfer. From a June 5, 2018 news item on ScienceDaily,
Quantum physics is on the brink of a technological breakthrough: new types of sensors, secure data transmission methods and maybe even computers could be made possible thanks to quantum technologies. However, the main obstacle here is finding the right way to couple and precisely control a sufficient number of quantum systems (for example, individual atoms).
A team of researchers from TU Wien and Harvard University has found a new way to transfer the necessary quantum information. They propose using tiny mechanical vibrations. The atoms are coupled with each other by ‘phonons’ — the smallest quantum mechanical units of vibrations or sound waves.
“We are testing tiny diamonds with built-in silicon atoms – these quantum systems are particularly promising,” says Professor Peter Rabl from TU Wien. “Normally, diamonds are made exclusively of carbon, but adding silicon atoms in certain places creates defects in the crystal lattice where quantum information can be stored.” These microscopic flaws in the crystal lattice can be used like a tiny switch that can be switched between a state of higher energy and a state of lower energy using microwaves.
Together with a team from Harvard University, Peter Rabl’s research group has developed a new idea to achieve the targeted coupling of these quantum memories within the diamond. One by one they can be built into a tiny diamond rod measuring only a few micrometres in length, like individual pearls on a necklace. Just like a tuning fork, this rod can then be made to vibrate – however, these vibrations are so small that they can only be described using quantum theory. It is through these vibrations that the silicon atoms can form a quantum-mechanical link to each other.
“Light is made from photons, the quantum of light. In the same way, mechanical vibrations or sound waves can also be described in a quantum-mechanical manner. They are comprised of phonons – the smallest possible units of mechanical vibration,” explains Peter Rabl. As the research team has now been able to show using simulation calculations, any number of these quantum memories can be linked together in the diamond rod thanks to these phonons. The individual silicon atoms are “switched on and off” using microwaves. During this process, they emit or absorb phonons. This creates a quantum entanglement of different silicon defects, thus allowing quantum information to be transferred.
The road to a scalable quantum network
Until now it was not clear whether something like this was even possible: “Usually you would expect the phonons to be absorbed somewhere, or to come into contact with the environment and thus lose their quantum mechanical properties,” says Peter Rabl. “Phonons are the enemy of quantum information, so to speak. But with our calculations, we were able to show that, when controlled appropriately using microwaves, the phonons are in fact useable for technical applications.”
The main advantage of this new technology lies in its scalability: “There are many ideas for quantum systems that, in principle, can be used for technological applications. The biggest problem is that it is very difficult to connect enough of them to be able to carry out complicated computing operations,” says Peter Rabl. The new strategy of using phonons for this purpose could pave the way to a scalable quantum technology.
Here’s a link to and a citation for the paper,
Phonon Networks with Silicon-Vacancy Centers in Diamond Waveguides by M.-A. Lemonde, S. Meesala, A. Sipahigil, M. J. A. Schuetz, M. D. Lukin, M. Loncar, and P. Rabl. Phys. Rev. Lett. 120 (21), 213603 DOI:https://doi.org/10.1103/PhysRevLett.120.213603 Published 25 May 2018
