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Reposted

John Preskill @preskill.bsky.social · 1d

The pioneering work of Clarke, Devoret, and Martinis showed that very cold electrical circuits behave in ways that exhibit fundamental principles of quantum physics.
www.nobelprize.org/prizes/physi...

Nobel Prize in Physics 2025

The Nobel Prize in Physics 2025 was awarded jointly to John Clarke, Michel H. Devoret and John M. Martinis "for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in an...

www.nobelprize.org

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Reposted

Dave Bacon @dabacon.tachyon.institute · 2d

Nice result on inherent size of fault-tolerance scirate.com/arxiv/2510.0...

"Our work contributes to this broader effort by providing evidence of inherent limits: Even when codes
have good rate, there may be fundamental constraints on how much they can reduce the volume of
fault-tolerant circuits."

Tradeoffs on the volume of fault-tolerant circuits

Dating back to the seminal work of von Neumann [von Neumann, Automata Studies, 1956], it is known that error correcting codes can overcome faulty circuit components to enable robust computation. Choos...

scirate.com

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · 4d

I like the alt-text tradition on this website but I forgot it on the picture above. It is a parking lot at the front of a hotel where people can park while they talk to the front desk. A covered stairway to the right leads to the reception. Beyond the parking lot are oak trees.

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Reposted

Dr. Aimee K. Gunther @aimeekgunther.bsky.social · 4d

It may not be shiny but there are several critical enabling technologies needed to make quantum networking happen ⚛️

phys.org/news/2025-10...

White Rabbit optical timing technology meets quantum entanglement

A small yet innovative experiment is taking place at CERN. Its goal is to test how the CERN-born optical timing signal—normally used in the Laboratory's accelerators to synchronize devices with ultra-...

phys.org

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · 5d

#hotelview of the parking lot. It is my "lot" in life.

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · 5d

I also spent one afternoon networking and flyfishing

A smiling man in a floppy hat holding a small fish in one hand and a fly rod in the other on a lawn of grass.

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · 5d

Went to the Wintergreen Meeting on Physical Chemistry
wintergreen.web.illinois.edu and had a nice hike with @juliebiteenlab.bsky.social

Wintergreen Meeting of Physical Chemists 2025 - Wintergreen Meeting of Physical Chemists

September 27 – October 1, 2025Wintergreen Resort – Wintergreen, Virginia The Wintergreen Meeting of Physical Chemists is a 5-day workshop for fac...

wintergreen.web.illinois.edu

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · 20d

modern MySpace has been "facebookized"
this is a real let down and I am sad I forgot to ask the wayback machine save my joke myspace page. This tiktok video captures only a tiny subset of the possible designs. As you can see, it is not like here.

www.tiktok.com/@uzamaki328/...

2000’s myspace layouts #myspace #myspacekid #myspacedays #myspacenostalgia #myspacelayout #myspacesongs #myspacetom #myspacethrowback #myspacewallpapers #myspacetomwouldnever #myspacescenequeen #myspa...

TikTok video by uzamaki328

www.tiktok.com

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · 21d

One danger of modern social media is that crazy posts, bot posts, and real posts all look professional due to formatting. I call it the myspace vs facebook divide or the difference between a zine and a pamphlet. Now I find this non-crazy zine on social media and may need to rework my analogies.

nate @loglog.wtf · 22d

I made a zine about quantum gates and distributed it at @unitary.foundation's unitaryCON this two weeks ago.

check it out :) and lemme know what you think

nates.place/static/ng01....

cover of zine called nates gates created on a typewriter

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · 22d

My favorite Robert Redford movie is Sneakers which features a computer that can break RSA encryption and came out 2 years before Shor's algorithm.
www.youtube.com/watch?v=F5bA...

Sneakers (4/9) Movie CLIP - No More Secrets (1992) HD

YouTube video by Movieclips

www.youtube.com

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Reposted

James Wootton @decodoku.bsky.social · 23d

Tenure track assistant prof job up for grabs in Basel. It's quantum computing theory, based in computer science, and part of the NCCR SPIN.

Whoever gets this job will probably have to collaborate with me. Whether you see that as a pro or con is up to you.

jobs.unibas.ch/offene-stell...

Universität Basel: Tenure-track Assistant Professorship in Theoretical Quantum Computing

The University of Basel, Switzerland, invites applications for a professorship in theoretical quantum computing. The University of Basel is the home institution of the Swiss National Center of Compete...

jobs.unibas.ch

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Reposted

Arthur Pesah @arthurpesah.bsky.social · 25d

New paper out ✨

Fault-tolerant Transformation of Spacetime Codes, a collaboration w/ @vasmer.bsky.social, Austin Daniel & Ilan Tzitrin, which started during my internship @xanaduai.bsky.social

scirate.com/arxiv/2509.0...

Let's now see if I can summarize 101 pages (🙈) in a few tweets (and memes!)

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 9

My rule for #hotelview photos is that the camera should be pressed to the glass. Here is the best picture from the same window at the same time.

A light house and the sea near sunset taken from a hotel window in Egmond aan Zee.

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 9

Here is the #hotelview

A view of one part of a hotel from the other part of the hotel across a flat roof at sunset.

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 9

At the European Conference on Trapped Ions talking about quantum simulation with ions today
www.ecti2025.com/home

https://www.ecti2025.com/home

Your cookies are disabled, please enable them.

www.ecti2025.com

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Reposted

Craig Gidney @craiggidney.bsky.social · Sep 8

Apparently September 5th is "cultivate with fold-transversal S" day:

arxiv.org/abs/2509.05232

arxiv.org/abs/2502.017...

arxiv.org/abs/2509.05212

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 7

#Sunailday #SnailsofBluesky Snail in Ridgefield, WA

Snail on a cut plant by a fence in Ridgefield, WA

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 5

QACTI Pilot: No tattoo
QACTI Design: Temporary tattoo
QACTI Implementation: The future is unwritten
pratt.duke.edu/news/duke-nq...
#NSF #NQVL

Arm with temporary tattoo of a prickly pear cactus pulling Nielsen and Chuang's Quantum Computation and Quantum Information book off a shelf of QM books

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Reposted

Robert “The Bobby Yaga” McNees @mcnees.bsky.social · Sep 3

If you are a college student, maybe a week or two into the semester, why not visit office hours and ask your professor that question?

You know, that thing you were wondering in class? Or when you were doing the homework?

Go ask them! That’s why they are there. They will be excited to see you.

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 3

I feel like I learned everything from Manny Knill and I only met him a dozen times.

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Reposted

Joschka Roffe @qec.codes · Sep 3

📢 Our paper, 𝗟𝗼𝗰𝗮𝗹𝗶𝘀𝗲𝗱 𝘀𝘁𝗮𝘁𝗶𝘀𝘁𝗶𝗰𝘀 𝗱𝗲𝗰𝗼𝗱𝗶𝗻𝗴 𝗳𝗼𝗿 𝗾𝘂𝗮𝗻𝘁𝘂𝗺 𝗹𝗼𝘄-𝗱𝗲𝗻𝘀𝗶𝘁𝘆 𝗽𝗮𝗿𝗶𝘁𝘆-𝗰𝗵𝗲𝗰𝗸 𝗰𝗼𝗱𝗲𝘀, is now published in Nature Communications (Nature Portfolio). Great to see it in print!

www.nature.com/articles/s41...

Localized statistics decoding for quantum low-density parity-check codes - Nature Communications

Quantum low-density parity-check (QLDPC) codes offer lower overhead than topological quantum error-correcting codes, but decoding remains a key challenge for scalable fault-tolerant quantum computing....

www.nature.com

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 1

Ditto from me.

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Sep 1

If you are at QCE 2025, please check out these talks from the lab
#IEEEQuantumWeek
Jude Alnas TP06::QSYS::96 arxiv.org/abs/2507.15995
Marissa D'Onofrio TP16::QSYS::453 arxiv.org/abs/2507.12323
Sahil Khan TP55::QSYS::523 arxiv.org/abs/2508.03914

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Aug 27

I am currently at an IARPA program review in DC and accidentally picked a hotel that is across the street from @optica.org ( #hotelview ). We had a nice social event on the balcony with flowers in 2019. I was surprised to find that I took a photo and captured the window of my current hotel room.

2025 picture of DC landscape showing the Optica building from a hotel window.

2019 DC cityscape phot from the balcony of Optica building (then the Optical Society of America) showing the hotel window the hotelview photo was taken from.

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kenbrownquantum.bsky.social @kenbrownquantum.bsky.social · Aug 27

In 2019 Rob Thew (www.unige.ch/gap/qic/qtec...) and I hosted a Workshop on US-EU Collaboration in Quantum Information Science at the @optica.org building. Here is the workshop photo. I know @tahantech.bsky.social and @andreasateth.bsky.social are on bluesky. Everyone else tag yourself.

Scientists and government officials outside of the Optica building in 2019.

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