kenbrownquantum.bsky.social

Lift one up in toast and sing the Cohen-Tannoudji song. www.lkb.fr/en/laboratoi...

For your listening pleasure

#quantinuum QEC team absolutely killing it right now. Here's the latest results showing logical error rate down to 5x10^-6 with the colour code. On the Helios hardware. Get stuck in! #quantumcomputing #qec #quantum arxiv.org/abs/2610.24077

The particle-physics process of string breaking has been modelled on a trapped ion quantum computer 🧪⚛️ ow.ly/g6vU50ZX5gf

Our results on single molecule spectroscopy have been published. This has been one of the major goals of our lab @uniinnsbruck.bsky.social ! A more detailed summary is given on our website: www.quantum-molecules.eu The full text is available open access at: www.nature.com/articles/s41...

Nice visit to Yale Quantum Institute yesterday. Here was the #hotelview

Carlos Bravo-Prieto, Aram Harrow (@harrowing.bsky.social), and I just uploaded a preprint that proves new upper and lower bounds to finally close the query complexity of the quantum linear systems problem. scirate.com/arxiv/2609.3... arxiv.org/abs/2609.35660

Some good personal news in these strange and turbulent times: I was just promoted to Associate Professor on indefinite Tenure, effective Aug 16 🥲 Immensely grateful to everyone who helped me get here - I won't list them since they know who they are 😊

I am very happy to see our work on non-Clifford gates with 2D non-Abelian topological phases published in PRX journals.aps.org/prx/abstract.... This is definitely among the most exciting projects I have worked on.

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

Big update: the EC Zoo is now a handbook. It spans codes, sphere packings, lattices, designs, groups, and phases of matter. Extensively checked, but not perfect—feedback very welcome: arxiv.org/abs/2606.11484

Lightning talk submissions are open for the Quantum Software 2.6 workshop at IEEE Quantum Week in Toronto. Working on quantum software? We'd love to hear from you. Workshop: sites.google.com/view/quantum... Submit: forms.gle/fnSPSmERLSPq...

Extractors: smaller than the code, enable full logical processing, same error rate as memory, compatible with fixed connectivity. As promised, they turn quantum memories into quantum processors. arxiv.org/abs/2606.03507 Joint work with the wonderful John Blue, Harry Zhou, and Ike Chuang.

TartanQEC Workshop | University of Edinburgh 24-26 June. The full programme is now available. Poster submissions are still being accepted & registration deadline is 1st June. Sign up now 👇 qec.codes/tartan2026/t...

Excited to share our new work led by fantastic undergraduate research student Cassie Hopkin. We show that many translation invariant qLDPC codes can be viewed as compactifications of a single parent fracton code that is local in a higher dimension. arxiv.org/abs/2605.19298 @vva.bsky.social

Very excited to explore new roads to fault-tolerant photonic quantum computation with PsiQuantum! rms.arc.gov.au/RMS/Report/D... @arc-gov-au.bsky.social @sydney.edu.au @psiquantum.bsky.social @bartlettquantum.bsky.social @acdoherty.bsky.social @jcbridgeman1.bsky.social @quantum-roberts.bsky.social

Congrats to all the 2026 graduates from my lab! Read more about them and their papers on the lab website. brownlab.pratt.duke.edu/news/2026-gr...

We just posted a new paper: “Architecting Early Fault Tolerant Neutral Atoms Systems with Quantum Advantage” arxiv.org/abs/2604.19735 🚀🎉 Our goal was to identify fault-tolerant (FT) architectures for neutral atom platforms that can enable quantum advantage experiments in the near future.

Accepted submissions for QEC26 are out: qec-conference.org/2026/accepte.... Congratulations! If you are attending QEC, a few reminders below:

Congrats to Keegan Ryan for being the first to exploit the simulator we used to validate the secret quantum circuits: blog.trailofbits.com/2026/04/17/w... It kills me that the (now fixed) bugs were simple (we didn't port the op validation code from C++ to Rust!), but that's to be expected.

In this MURI project with Sebastian Will (Columbia), Yongshan Ding (Yale), Shruti Puri (Yale), and Daniel Grier (UCSD), we will explore the potential uses and benefits (and limitations!) of using quantum gates that can act on many qubits at a time.

Swarnadeep Majumder, Brown Lab Alumni, at the APS Global Summit!

John Preskill expressing thanks to quantum pioneers of the past century and wishing good fortune to the audience, the quantum explorers of the future in an inspiring talk at #APSSummit26 #quantum

I'm looking forward to the Kavli Symposium tomorrow at the APS Global Physics Summit, where I'll speak about "The Road to Quantum Advantage." summit.aps.org/events/MAR-X02

Wow, amazing!! www.quantamagazine.org/quantum-cryp...

To close out the first day, I'm in a session where Michael Turner and Maria Spiropulu are presenting the EPP report for the future of particle physics, which came out last year. (Separate from the '24 P5 report) EPP Report: www.nationalacademies.org/read/28839/c...

Dropping in to this session on changes to student visas. summit.aps.org/events/EVM-J...

On another note, I’m looking for a 6‑month intern to work with me. Feel free to reach out to me. #QuantumComputing #QuantumErrorMitigation #MachineLearning #APSSummit26 #QuantumResearch

Starting off Monday with the... well, memorial plenary for the Relativistic Heavy Ion Collider (RHIC).

Celebrate with us Quantum's approaching 10 year anniversary in 2026 with the publication of the 2026th paper! Do you know which paper that is? quantum-journal.org/2026-quantum...

The APS Meeting in Denver starts in earnest tomorrow and as sort of an experiment to see if this still works, I've resolved to actually cover the conference on social media (like we did in days of yore), so bear with me for what will be a couple days of posting about physics.

Had a great visit to the University of Wisconsin - Madison. Here is the #hotelview photo of the amazing new CS building, Morgridge Hall.

If you are interested in working in the intersection of QEC and software check out our job posting for a position at Quantinuum: jobs.eu.lever.co/quantinuum/b... Areas of research include QEC software development, logical noise modeling, resource estimation, QEC/Hardware co-design, and more.

Have you ever wondered about the dimensionality of the massive Schwinger model with a two-dimensional, non-periodic electric field? Well, we counted it and proved that it follows the bisection of the Lucas numbers (oeis.org/A005248). This leads to incompatibility with Gauss's law stabilizer QEC.

Registration is now open for QEC26, to be held this June in sunny Santa Barbara, CA! See the registration page at qec-conference.org for a link. Also, the deadline for submissions is next Friday. Make sure to get those in and spread the word to friends and collaborators!

10 years after its founding, driven by the energy, enthusiasm, & dedication of the community @quantum-journal.bsky.social quietly published paper #2000 some days ago. At least I think this is a big deal, big shout out to the founders & all authors, reviewers, editors, board members & contributors!

Excited to see Swapnil Patel's paper measuring charge exchange between K and CaH+ on the arXiv arxiv.org/abs/2602.09142 . Joint work with @michaltomza.bsky.social and Dibyendu Sardar at the University of Warsaw. Here is a picture of Swapnil (orange jacket) skiing with other Brown lab alumni.