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Ross Duncan

@rossquantum.bsky.social
719 followers 396 following 271 posts

Quantum computing lifer. ZX-calculus co-inventor. Quantum compiler compiler and quantum programmer programmer. String diagrammer. Category theoriser. Senior Fellow @ Quantinuum (I cannot read DMs on Bluesky)

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Ross Duncan @rossquantum.bsky.social · 02/10/2026
Are you sick of AI? Do you want to learn something that ChatGPT doesn't know? Do you want to read some history done the old fashioned way, by shuffling around in an archive for a year? Here you go: ingridfiv.github.io/ingridsblog/... #history #Japan #germany
ingridfiv.github.io
Reparation and restoration: German and British books in Japan
Liebermann’s library is only one of many European collections that made their way to Japan in the 1920s. Their journeys are part of a fascinating story of international aid and reparations in the afte...
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Kartik @k4rtik.bsky.social · 24/09/2026
My team at @quantinuum.bsky.social is hiring a Principal Quantum Compiler Engineer! We're tackling some fascinating compiler problems on the path to fault-tolerant quantum computing. Come work with us or please share with someone who might be interested! jobs.eu.lever.co/quantinuum/6...
jobs.eu.lever.co
Quantinuum - Principal Quantum Compiler Engineer - 924
We are seeking a Principal Quantum Compiler Engineer in our Broomfield, CO Location. As quantum hardware rapidly scales toward fault-tolerant systems, compiler technology is becoming one of the fundam...
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Ross Duncan @rossquantum.bsky.social · 01/10/2026
It does not spark joy. > sudo rm -rf /*
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qubric.bsky.social @qubric.bsky.social · 01/10/2026
🚀 QuBriC officially starts today! QuBriC is building the foundations of scalable, fault-tolerant quantum computing while training the next generation of quantum researchers. 🎓 15 funded PhD positions! Interested? Explore the vacancies and join the future of quantum computing🔗 www.qubric.eu
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Ross Duncan @rossquantum.bsky.social · 30/09/2026
I would go to QIP if this happened.
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Graeme Smith @graemesmith.bsky.social · 28/09/2026
Shame on @qipconference.bsky.social for using X/twitter. You give our community a bad name.
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Dulwich Quantum Computing @dulwichquantum.bsky.social · 28/09/2026
"Good name is better than silver and gold. And no money, no money, no money, no money, no money can buy good name." -- William Onyeabor www.youtube.com/watch?v=27nC...
youtube.com
William Onyeabor – Good Name (Official Video)
YouTube video by Luaka Bop
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Clemens @gibtsdes.bsky.social · 30/09/2026
Hi #Edinburgh, your twin city #Kyiv is being bombed 24/7 and needs some attention. I know the bombing is not your fault, but silence can also be a crime. You were active when the full invasion started, but now interest seems to have waned?
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Ross Duncan @rossquantum.bsky.social · 25/09/2026
I was in Toronto for IEEE #Quantum Week / IWQC / QRE. Here me giving a talk about #guppylang at etc Quantum Software 2.6 workshop and with my co-panelists, Rafael Haenel, Roger Luo, Brad Chase, Sebastian Feld, and Mathys Rennela. #guppy #quantumcomputing guppylang.org
Ross Duncan giving a talk next to a giant picture of a fish.Six people standing in front of a desk
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Ross Duncan @rossquantum.bsky.social · 24/09/2026
Must be in my collection of unprocessed IWQC messages....
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Ross Duncan @rossquantum.bsky.social · 24/09/2026
Hi Mark -- are the rest of the photos published somewhere?
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comp_phys_marc @marcusedwards.me · 22/09/2026
I had the opportunity to attend the International Workshop on Quantum Compilation this past weekend at Xanadu headquarters in Toronto! #quantum #compiling #iwqc
The attendees of IWQC raising their hands The attendees of iwqcMarcus discussing with Dr. KissingerMarcus discussing with Raphael
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Ross Duncan @rossquantum.bsky.social · 17/09/2026
I'll be speaking at this, at 13:00. Can't promise it will be good, but I'd be happy to see you!
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Nirmalya Kajuri @kajunut.bsky.social · 13/09/2026
Deeply saddened to learn that Rafael Sorkin is no more. One of the deepest and most original thinkers of quantum gravity and the pioneer of causal set theory, he was also among the nicest, gentlest physicists I have met.
image of rafael sorkin
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Ross Duncan @rossquantum.bsky.social · 10/09/2026
I am reminded of Eisenhower's famous speech: "Every gun that is made, every warship launched, every rocket fired signifies, in the final sense, a theft from those who hunger and are not fed, those who are cold and are not clothed." Mutatis mutandi.
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Clément Canonne @ccanonne.github.io · 09/09/2026
For context, to ground the conversation and explain one of the issues. USD20M, which is a self-reported (likely low-balled) estimate of what OpenAI burned in *one week* in their scooping race, would fund 100 full-time postdoctoral positions for 2 years (including overhead). 100 postdocs. 2 years.
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Arnaud Spiwack @aspiwack.bsky.social · 10/09/2026
Indeed indeed. Et c'est pour ça que peut-être, on pourrait considérer laisser les gens habiter où ils veulent, non? Tous les gens. Dans n'importe quel pays. Plutôt que d'imposer des permis de résidence qui font qu'à tout moment une vie peut être bouleversée par une décision administrative.
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Ross Duncan @rossquantum.bsky.social · 03/09/2026
For QEC a similar hierarchy is probably needed, but we'd expect to transform the data in-flight to provide more information to next syndrome-processor* in the chain. *I just made up this term, because there's no need for it to be a full blown decoder.
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Ross Duncan @rossquantum.bsky.social · 03/09/2026
Interesting comparison! My knowledge of detectors is 25 years out of date, but my recollection is that the processing is basically a big hierarchy of keep/discard decisions (from fast to slow) but the event data is minimally processed.
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Ross Duncan @rossquantum.bsky.social · 01/09/2026
Yes! It drives me mad. I suppose the crew would rather everyone went to sleep.
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Ross Duncan @rossquantum.bsky.social · 01/09/2026
Controversial suggestion: it's time for a complete *stop* to Bond. And Batman, and Alien, and all the rest. Make some new stuff!
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Ross Duncan @rossquantum.bsky.social · 01/09/2026
What?! So sad.
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The Tennessee Holler @thetnholler.bsky.social · 29/08/2026
🇫🇷 FRANCE: “A photograph of Palestinian footballers playing on a makeshift pitch surrounded by the ruins of Gaza has been removed from a major sports photography exhibition in France following complaints from pro-Israel campaigners.” greatreporter.com/2026/08/25/e...
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Glyph @glyph.im · 30/08/2026
the social contract that allows the web to exist at all is literally collapsing in real time people.kernel.org/monsieuricon/cree…
people.kernel.org
Creepy crawlies
Comments
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Gro-Tsen @gro-tsen.bsky.social · 27/08/2026
Look, it's really simple: if its a work tool, your employer should pay for it, not you. Please don't contribute to normalizing “pay for your own work tools”.
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Ross Duncan @rossquantum.bsky.social · 27/08/2026
Conferences suck. Little workshops are much better. I like this idea: www.argmin.net/p/microconfe...
argmin.net
Microconferences
A proposal to create alternative systems for generating, evaluating, and sharing knowledge
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Ross Duncan @rossquantum.bsky.social · 27/08/2026
Is that my old office? (The history corner room)
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mgualt.bsky.social @mgualt.bsky.social · 25/08/2026
A letter to the math community, to appear in the Notices. In response to what I view as irresponsible messaging and unfortunate decisions from some mathematical leaders influencing many in my department. www.math.toronto.edu/mgualt/math-...
math.toronto.edu
Mathematics and the LLM: 2026 – Coordinate Change
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Ross Duncan @rossquantum.bsky.social · 24/08/2026
Registration for IWQC 2026 has been extended to 31st August. If you want to hear about the state of the art of quantum compilers sign up while there is still space! It's happening at Xanadu HQ in Toronto 19 - 20 September. #iwqc #quantum #quantumcomputing quantum-compilers.github.io/iwqc2026/
quantum-compilers.github.io
8th International Workshop on Quantum Compilation
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Ross Duncan @rossquantum.bsky.social · 21/08/2026
Bicycles are clearly the most monstrous on that list, by a fair margin. Their users become meat and metal chimeras.
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Ross Duncan @rossquantum.bsky.social · 20/08/2026
Yes! Kraftwerk had it right when they called it the man-machine.
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Ross Duncan @rossquantum.bsky.social · 18/08/2026
Cyborgs are inherently monstrous. It's an affront to God.
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Ross Duncan @rossquantum.bsky.social · 17/08/2026
@xanaduai.bsky.social @vadym-kl.bsky.social @awsto.bsky.social Ran out of chars to tag you in the main post :-/
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Ross Duncan @rossquantum.bsky.social · 17/08/2026
Two weeks to go! Registration for IWQC 2026 is still open. If you like to compile software for your quantum computer you should probably go. Invited talks from Vadym Kliuchnikov and Aws Albarghouthi! At Xanadu HQ in Toronto 19 - 20 September. #iwqc #quantum quantum-compilers.github.io/iwqc2026/
quantum-compilers.github.io
8th International Workshop on Quantum Compilation
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Ross Duncan @rossquantum.bsky.social · 30/07/2026
Yet another job ad! We're looking for a software engineer to work on our open source Tierkreis workflow system (focussing on quantum-HPC hybrid integration). The job is based in Singapore. #quantumcomputing #jobad jobs.eu.lever.co/quantinuum/8...
jobs.eu.lever.co
Quantinuum - Advanced Software Engineer – Hybrid Quantum-HPC Orchestration - 860
We are seeking a talented and innovative Software Engineer/Developer to design and develop a hybrid workflow orchestrator between Quantinuum quantum processors and classical supercomputing resources i...
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Caroline Ball @heroicendeavour.eurosky.social · 29/07/2026
Reading articles on the amounts HE has spent in APCs over the last 5-10 years, and slowly watching my blood pressure rise. Millions upon millions, on something WE CAN ABSOLUTELY DO OURSELVES FOR A FRACTION OF THE COST - what universities couldn't do with that kind of money now... 😠 And breathe...
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Ross Duncan @rossquantum.bsky.social · 16/07/2026
I should add that the job is in the UK and you should plan to be in (preferably) Cambridge or London. If you want a remote position -- this is not it. If needed, we can help get visas for people we hire.
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Ross Duncan @rossquantum.bsky.social · 16/07/2026
We want to hire an Offering Manager for our Developer Platform. This means working out what developers need for doing quantum computing, and then making that happen. Experience in writing (quantum) software will help a lot. jobs.eu.lever.co/quantinuum/9... #jobad #quantum #quantumcomputing
jobs.eu.lever.co
Quantinuum - Sr. Director, Offering Management – Quantum Developer Platform - 836
We are seeking a Sr. Director, Offering Management to join our team in the London or Cambridge, UK offices. Lead the strategy and execution of a cloud-based quantum developer platform that enables dev...
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Ross Duncan @rossquantum.bsky.social · 10/07/2026
Last day to submit your contribution to the quantum compilers workshop! We want a 3--5 pages abstract describing your best compiling ideas! #quantum #quantumcomputing #compilers #iwqc2026 quantum-compilers.github.io/iwqc2026/
quantum-compilers.github.io
8th International Workshop on Quantum Compilation
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Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · 01/07/2026
At today's UKRI board meeting, the fate of UK particle physics and astronomy will likely be decided. Have we done enough to convince the powers-that-be to halt the proposed funding cuts? 🤞 Read Prof. Hiranya Peiris in Nature today eloquently explaining why these cuts are wrong.🧪🔭⚛️ 📖: rdcu.be/friwM
Restructuring research funding as a choice between discovery and application gets the economics wrong, the evidence wrong and the people wrong.

A premise is gaining traction in science policy on both sides of the Atlantic: that fundamental and applied research are competing claims on the same budget, and that the balance must shift towards application. In the USA, the current administration has proposed cuts of billions of dollars to the National Institutes of Health and the National Science Foundation. In the UK, the national funding agency UK Research and Innovation (UKRI) is restructuring its portfolio around government growth priorities, with curiosity-driven research nominally protected but the grant lines that actually fund investigators under severe pressure. The language varies — ‘doing fewer things better’, ‘aligning research with industrial strategy’ — but the underlying logic is the same. Fundamental science, the argument goes, is a luxury that becomes dispensable when budgets are tight. This premise is wrong, and the consequences of acting on it are already visible.
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Bob Coecke @coecke.bsky.social · 30/06/2026
Here's Relational Intelligence. rel-int.ai Why? Current LLMs are unexplainable, no path to efficiency, no path to scalability... How? The same structure governs quantum mechanics and natural language, and cognition more generally. We use this to build AI whose reasoning you can trust. When? Now!
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👻madeline bOoOoOoOodent👻 @oldenoughtosay.com · 25/06/2026
I’m British and this is the one American take on the discourse that I wholeheartedly approve this is the damn problem
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Ross Duncan @rossquantum.bsky.social · 22/06/2026
I think that's correct.
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Ross Duncan @rossquantum.bsky.social · 22/06/2026
Monday morning respam of Friday afternoon's spam:
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Ross Duncan @rossquantum.bsky.social · 19/06/2026
Do you like compiling quantum software? Maybe you should send something to the 8th International Workshop on Quantum Compilation? The deadline is the 10th of July! Tell your friends! (Just the cool ones.) quantum-compilers.github.io/iwqc2026/ #quantum #compilers #quantumcomputing #iwqc2026
quantum-compilers.github.io
8th International Workshop on Quantum Compilation
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Ross Duncan @rossquantum.bsky.social · 19/06/2026
Actually you don't need Y. :-P
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Ross Duncan @rossquantum.bsky.social · 18/06/2026
My first Nature paper! I had very little to do with it :-) www.nature.com/articles/s41...
nature.com
A 98-qubit trapped-ion quantum computer with all-to-all connectivity - Nature
A new quantum computer, Quantinuum Helios, which is a 98-qubit trapped-ion quantum processor built on the QCCD architecture, demonstrates performance well beyond classical capabilities and provides a ...
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Ross Duncan @rossquantum.bsky.social · 18/06/2026
I didn't watch. How many seconds till 1966 was first mentioned?
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Coleen Murphy @ctmurphy1.bsky.social · 17/06/2026
one anecdote: I was searching for a link to one of my old papers on Google, and the automated Gemini summary attributed all of my lab's work to my husband
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nate @loglog.wtf · 11/06/2026
this pattern is so silly. just put your damn artifacts online
screenshot from a paper that reads:

Data availability
The data from the experimental runs are available on request.
Code availability
The quantum circuits used in these experiments are available on
request.
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