Anthony Leverrier Profile
Anthony Leverrier

@letonyo

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researcher on quantum error correction https://t.co/RvavYrCGWD

Paris
Joined May 2009
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@letonyo
Anthony Leverrier
1 day
RT @cloneofsimo: So we went from."LLM is memorizing dataset".to."LLM is not reasoning".to."LLM cannot do long / complex math proving".to."M….
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@letonyo
Anthony Leverrier
4 days
RT @ErnestRyu: This is really exciting and impressive, and this stuff is in my area of mathematics research (convex optimization). I have….
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@letonyo
Anthony Leverrier
4 days
RT @SebastienBubeck: Claim: gpt-5-pro can prove new interesting mathematics. Proof: I took a convex optimization paper with a clean open p….
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@letonyo
Anthony Leverrier
12 days
ha! you meant *those* nails 🤦.
@stripepress
Stripe Press
13 days
How was penicillin able to eliminate 80% of WWII battlefield deaths? Why did nails once make up 0.4% of US GDP?. In The Origins of Efficiency, @_brianpotter unpacks how production efficiency happens, and why it is of civilizational importance. Preorder:
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@letonyo
Anthony Leverrier
14 days
RT @daniel_271828: GPT-5 didn’t live up to OpenAI’s hype, but it is *exactly* in line with extrapolations from prior AI advancements. Go ah….
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@letonyo
Anthony Leverrier
23 days
might apply to quantum computing startups as well. .
@paulg
Paul Graham
23 days
Startups often think a partnership with a big company will be a shortcut to growth. It pretty much never works. Nor does any other apparent shortcut. There are no shortcuts. The way to get growth is to engage closely with your users.
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@letonyo
Anthony Leverrier
2 months
RT @Ananyo: @letonyo Relates to the fact that the strength of the architecture is also a weakness--data and instructions stored in the same….
en.wikipedia.org
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@letonyo
Anthony Leverrier
2 months
Great work by Yiyi Cai that improved the analysis of robustness for the local codes used in quantum Tanner codes. (To be fair, the bounds remain quite pessimistic if one wishes good quantum LDPC codes with linear distance.).
@preskill
John Preskill
3 months
Undergrad @Caltech @yiyiicai has done research in our group for two years, including a senior thesis. She'll be a Gates Cambridge Scholar for a year, followed by PhD studies in computer science @Stanford. Congratulations, Yiyi, you'll be missed!
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@letonyo
Anthony Leverrier
2 months
RT @sama: also, here is one part that people not interested in the rest of the post might still be interested in:
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@letonyo
Anthony Leverrier
3 months
What a great initiative !.
@random_walker
Arvind Narayanan
3 months
📢 People that I know often send me their draft papers to get feedback. I enjoy doing this sort of informal peer review and would like to open it up to everyone. Details in the Q&A below. What is informal peer review and why is it helpful?. The *formal* peer review system serves.
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@letonyo
Anthony Leverrier
3 months
RT @letonyo: #newpaper Bosonic codes can dramatically reduce the cost of fault tolerance and many codes look like serious contenders: dual-….
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@letonyo
Anthony Leverrier
3 months
RT @CraigGidney: I'm often asked if I'll redo the 2019 quantum factoring estimate. Denser storage by yokes, smaller magic factories by cult….
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@letonyo
Anthony Leverrier
3 months
this is a simple example, but the idea of encoding with a (generalized) Fourier transform seems quite neat so maybe there are more interesting instances to be explored. The paper is here:.(4/4).
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arxiv.org
While 2-level systems, aka qubits, are a natural choice to perform a logical quantum computation, the situation is less clear at the physical level. Encoding information in higher-dimensional...
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@letonyo
Anthony Leverrier
3 months
- code states are products of 2 cat qubit states.- the code corrects a single-photon loss on either mode.- it admits a nice universal gate set.- stabilization uses the same Lindblad operators as the 4-legged cat qubit and pair-cat (3/4).
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@letonyo
Anthony Leverrier
3 months
Turns out that there is a very generic way to design multimode bosonic codes with nice get sets: simply apply an inverse Fourier transform (of some finite group) as the encoding map. Instantiated with the simplest interesting group <X,Z>, this gives a new 2-mode cat code (2/4).
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@letonyo
Anthony Leverrier
3 months
#newpaper Bosonic codes can dramatically reduce the cost of fault tolerance and many codes look like serious contenders: dual-rail qubit, cat qubit, GKP. But the Fock space is huge, esp. if you consider multimode encodings, and there are many great codes waiting to be found (1/4).
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@letonyo
Anthony Leverrier
3 months
RT @louis_plta: High-performance local automaton decoder for defect matching in 1D, happy to share that our new work in with @letonyo, Mazy….
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@letonyo
Anthony Leverrier
4 months
is there a standard name for the representation of U(n) on the n-mode Fock space that associate to U \in U(n) the unitary .{a_i} --> {\sum_j U_{i,j} a_j} ?."metaplectic representation"?.
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@letonyo
Anthony Leverrier
4 months
RT @OwenGregorian: China builds world’s first working thorium reactor using declassified US documents | Aamir Khollam, Interesting Engineer….
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@letonyo
Anthony Leverrier
4 months
RT @robertghrist: i have been dealing with a nagging dread that someone needs to 10X-100X the capacity of the ArXiV asap. when it hits (a….
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