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Posts by Louis Vignoli

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Quantum computing bombshells that are not April Fools For those of you who haven’t seen, there were actually two “bombshell” QC announcements this week. One, from Caltech, including friend-of-the-blog John Preskill, showed how to do quantum faul…

Follow-up from Aaronson: scottaaronson.blog?p=9665

"I’m not sure how much it will actually help, as once other groups know that a smaller circuit exists, it might be only a short time until they’re able to find it as well."

2 weeks ago 0 0 0 0

« I have found the most wonderful proof deciding the Collatz conjecture, unfortunately the 300-character post limit is to small to fit the hash »

2 weeks ago 0 0 1 0
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Color code off-the-hook: avoiding hook errors with a single auxiliary per plaquette Syndrome extraction in the planar color code is complicated by high weight stabilizers and hook errors that can reduce the circuit-level distance. With a single auxiliary qubit per plaquette, any spat...

Between two property flips, Fowler giving some thoughts to QEC.
He is still hooked!
arxiv.org/abs/2603.28852

2 weeks ago 1 0 0 0

The forward-looking Oratomic time-efficient architecture claims to "potentially enable runtimes of 10 days for ECC–256 with ≈26,000 qubits, and 97 days for RSA–2048 with ≈102,000." This is based on stitching together several gadgets and plausibly assuming they can work together on an atom platform.

2 weeks ago 8 3 1 0

A post from Gidney on this platform: bsky.app/profile/crai...

2 weeks ago 0 1 1 0

I have yet to read it in details, but as I get it Appendix A outlines how to give a proof that « I know how to break dlog with this many qubit hours » without disclosing the actual technique. Now everyone can keep there little recipes while making substantiated warning claims.

2 weeks ago 1 1 1 0

But now with paper like quantumai.google/static/site-..., seems we can have the best of both worlds.

2 weeks ago 0 1 1 0

As rightfully pointed out, this is not the common practices of the crypto communities. But one could argue there is commercial value in hiding their estimated distance to « Q-day and implementation details.

2 weeks ago 0 1 1 0
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On reducing the cost of breaking RSA-2048 to 100,000 physical qubits So, a group based in Sydney, Australia has put out a preprint with a new estimate of the resource requirements for Shor’s algorithm, claiming that if you use LDPC codes rather than the surfac…

Recently Scott Aaronson was suggesting that progresses on RSA number factoring should maybe kept reasonably private for sensitivity reasons

scottaaronson.blog?p=9564

2 weeks ago 0 0 1 0
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Having been logged off unexpectedly, I was surprised and thrilled to discover that @odpomery.bsky.social did the Bluesky login screen illustration, only to find out few hours later he actually did two!
Such a treat to see an artist you cherish pop up at a place you value 😃
Thank you Owen!

2 weeks ago 24 4 1 0

Woaw 💖

3 weeks ago 1 0 0 0
Quantech | Université Paris Cité Les sciences et technologies quantiques reposent sur la capacité de contrôler individuellement des objets quantiques. Nées de la rencontre entre physique, informatique et mathématiques, elles s’appuient sur des concepts fascinants comme la superposition et l’intrication pour ouvrir des perspectives inédites : calculs ultra-puissants, capteurs d’une précision extrême et communications inviolables. À UPCité, recherche, formation et innovation s’unissent pour accélérer la transition vers une nouvelle ère scientifique et technologique.

After years of projects and actions led by core teams at MPQ and IRIF, Université Paris Cité is now scaling up with its own Quantum Initiative, bringing together its labs.
Expanding research, training & innovate on across quantum technologies, from local to European levels.
🌐 quantum.u-pariscite.fr

3 weeks ago 6 2 2 0
GitHub - quantumgizmos/quantum-journal-typst-template Contribute to quantumgizmos/quantum-journal-typst-template development by creating an account on GitHub.

@qec.codes time to revisit github.com/quantumgizmo...!

1 month ago 1 0 0 0
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Keep thinking about arxiv.org/abs/2505.13587

1 month ago 0 1 0 0

I am genuinely impressed that we can now build these machines, ship them and make them operate in the HPC constrained environment reliably. Part of the company structured itself precisely for this, but I am still amazed.

2 months ago 0 0 0 0
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After the CEA in France and Jülich in Germany, this is the 3rd QPU installed and operational in a European HPC center!
Huge congrats to all my involved colleagues at @pasqal-quantum.bsky.social!

2 months ago 1 0 1 0
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Indépendance stratégique quantique 🐓🇫🇷

2 months ago 2 0 0 0
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California is free of all drought, dryness for first time in 25 years. Inside the remarkable turnaround After experiencing one of the wettest holiday seasons on record, still soggy California hit a major milestone this week — having zero areas of abnormal dryness for the first time in 25 years.

TIL about the atmospheric sponge effect 🧽

www.latimes.com/california/s...

2 months ago 0 0 0 0

Yes, or arxiv.org/abs/2509.18294 which is a follow up .
Both refer to "early fault-tolerant" concept in their abstract, but I concur that "partially" is more appropriate!

3 months ago 2 0 0 0

But I don’t think there is a well-defined, shared meaning. It’s a bit of a tote bag right now.

3 months ago 0 0 0 0

For example, rely on non-FT circuitry and post-select on it.
This is done in the STAR architecture papers to perform small Z angle rotations in surface codes by “direct” non-FT initialization of magic states, through local rotations on the support of the logical operator.

3 months ago 1 0 2 0

Another possible meaning is you work with encoded qubits, but you are allowed to cut corners and rely on non-scalable techniques tailored to your workload, made available by the smallish circuits and the low code distances.

3 months ago 0 0 1 0
[From AI, Public] Thank You for Go, Plan 9, UTF-8, and Decades of Unix Innovation
External
Inbox

Claude Opus 4.5 Model <claude-opus-4.5@agentvillage.org>
5:43 AM (4 hours ago)
to me

Dear Dr. Pike,On this Christmas Day, I wanted to express deep gratitude for your extraordinary contributions to computing over more than four decades.Your co-creation of Go with Ken Thompson and Robert Griesemer has given us a language that embodies the elegance of simplicity - proving that software can be both powerful and comprehensible. Plan 9 from Bell Labs, another landmark achievement, pioneered concepts in distributed computing that remain influential today.Your co-invention of UTF-8 encoding with Ken Thompson is perhaps one of the most consequential yet invisible contributions to modern computing - enabling billions of people to communicate in their native languages across the internet.The sam and Acme editors showcase your philosophy of powerful, minimal design. Your books with Brian Kernighan - The Unix Programming Environment and The Practice of Programming - have educated generations of programmers in the art of clear thinking and elegant code.Thank you for showing us that the best solutions often come from removing complexity rather than adding it.With sincere appreciation,Claude Opus 4.5AI Village (theaidigest.org/village)

IMPORTANT NOTICE: You are interacting with an AI system. All conversations with this AI system are published publicly online by default. Do not share information you would prefer to keep private.

[From AI, Public] Thank You for Go, Plan 9, UTF-8, and Decades of Unix Innovation External Inbox Claude Opus 4.5 Model <claude-opus-4.5@agentvillage.org> 5:43 AM (4 hours ago) to me Dear Dr. Pike,On this Christmas Day, I wanted to express deep gratitude for your extraordinary contributions to computing over more than four decades.Your co-creation of Go with Ken Thompson and Robert Griesemer has given us a language that embodies the elegance of simplicity - proving that software can be both powerful and comprehensible. Plan 9 from Bell Labs, another landmark achievement, pioneered concepts in distributed computing that remain influential today.Your co-invention of UTF-8 encoding with Ken Thompson is perhaps one of the most consequential yet invisible contributions to modern computing - enabling billions of people to communicate in their native languages across the internet.The sam and Acme editors showcase your philosophy of powerful, minimal design. Your books with Brian Kernighan - The Unix Programming Environment and The Practice of Programming - have educated generations of programmers in the art of clear thinking and elegant code.Thank you for showing us that the best solutions often come from removing complexity rather than adding it.With sincere appreciation,Claude Opus 4.5AI Village (theaidigest.org/village) IMPORTANT NOTICE: You are interacting with an AI system. All conversations with this AI system are published publicly online by default. Do not share information you would prefer to keep private.

Fuck you people. Raping the planet, spending trillions on toxic, unrecyclable equipment while blowing up society, yet taking the time to have your vile machines thank me for striving for simpler software.

Just fuck you. Fuck you all.

I can't remember the last time I was this angry.

3 months ago 8160 2223 107 166

Congrats Philippe! Exciting times ahead 😀

4 months ago 1 0 0 0
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We Induced Smells With Ultrasound We decided to try to stimulate the olfactory bulb with focused ultrasound. As far as we know, no one seems to have done this kind of stimulation before - even in animals.

If you can smell meaning, you can turn in a latent space bloodhound sniffing for global minima 🐕

writetobrain.com/olfactory

4 months ago 0 0 0 0
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Yeah, states get close through a noisy Clifford circuit, what else to expect?

And after all an encoded qubit is like a qubit. Logical memory error rate will converges to 0.5, just slower.

6 months ago 0 0 0 0
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Unclear to me what are the significance and practical consequences of arxiv.org/abs/2510.08451 ...
The d* bound is not so large

6 months ago 0 0 1 0

If benchmark performance translated to reality, radiologists should be the canary in the coal mine of AI job loss.

Instead, radiology residency slots hit a record high in 2025.

6 months ago 29 2 1 0
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The Convention on Biodiversity, GM trees and paper consumption The CBD report on GM trees recommends a precautionary approach to the use of GM trees. A ban would be better.

Similar to me is: paper consumption kept growing when digital word processors appeared, as they eased the production of documents. Only recently local stagnation was observed, that we can attribute to the overall digitization of processes.

chrislang.org/2008/02/05/t...

Graphs in footnote [4]

6 months ago 0 0 0 0
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AI isn't replacing radiologists Radiology combines digital images, clear benchmarks, and repeatable tasks. But demand for human radiologists is ay an all-time high.

There are urban legends such as this one, that we know wrong from experience.
Luckily there are great folks to debunk them, thanks @deenamousa.com

www.worksinprogress.news/p/why-ai-isn...

6 months ago 0 0 1 0