iiinova — where your digital self keeps evolving

Reposted by Matt McEwen

Dripto Debroy @dripto.bsky.social · 06/05/2026

The QEC room block closes on Friday, May 8th, and is filling quickly. I recommend registering for the conference if you haven't already, and then booking ASAP. Room block info at: qec-conference.org/2026/travel/

qec-conference.org

Travel and Accomodations

Travel Details The best way to get to Santa Barbara is to fly to Santa Barbara Municipal Airport (SBA), which is 7 miles from downtown Santa Barbara where the conference will be hosted. This airport i...

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Reposted by Matt McEwen

Dripto Debroy @dripto.bsky.social · 24/04/2026

Had some website troubles, so we're extending the early-bird deadline for QEC from tonight to Monday, April 27th. See qec-conference.org/2026/registr... for details. Sorry for the inconvenience.

qec-conference.org

Registration

Click here to register on EasyChair The registration fees are as follows: Fees Early Bird Regular Onsite Student Registration $600 $800 $1000 General Registration $700 $900 $1100 Early-bird registrati...

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Matt McEwen @matt.mcewen.xyz · 23/04/2026

The schedule for talks at QEC26 is now up on our website: qec-conference.org/2026/schedule The earlybird registration deadline is tomorrow, so sign up now! Looking forward to seeing you all in Santa Barbara

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Matt McEwen @matt.mcewen.xyz · 15/04/2026

The deadline to book in the hotel block at the Hilton Beachfront is May 8th, so we suggest that people do that as soon as they have decided to come to the conference. More information can be found at qec-conference.org/2026/travel/

qec-conference.org

Travel and Accomodations

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Reposted by Matt McEwen

Dripto Debroy @dripto.bsky.social · 27/02/2026

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!

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Matt McEwen @matt.mcewen.xyz · 02/02/2026

There’s more details on the Call for Submissions page on the website: qec-conference.org/2026/call/ Of course, we also have the usual track for posters, and we’re focusing on accepting as many as we can fit this year! Looking forward to seeing all the submissions!

qec-conference.org

Call for Submissions

Submissions to QEC26 are done through EasyChair. Click here to make a submission on EasyChair Submissions for talks and posters are open until the end of Friday, March 6th AOE.

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Matt McEwen @matt.mcewen.xyz · 02/02/2026

As an experimentalist, I’m excited to see submissions about QEC demonstrations and experiments happening right now. If you have a novel theory construction that’s easy for the Program Committee to assess without a manuscript, Rapid Communications is the place for that as well!

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Matt McEwen @matt.mcewen.xyz · 02/02/2026

New this year is the Rapid Communication track, which is aimed at letting us showcase more recent and ongoing work that’s of interest to the field. In place of a completed paper, submitting to this track requires a short rationale for how the field would benefit from a talk on the work.

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Matt McEwen @matt.mcewen.xyz · 02/02/2026

This year, we’re trialing a two-track system for talks: Published Work and Rapid Communication. The Published Works track is similar to previous years of QEC, where you submit a finished paper for a talk.

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Matt McEwen @matt.mcewen.xyz · 23/01/2026

The website for QEC26 is up at qec-conference.org, and the submission deadline for talks and papers is Friday March 6th AOE. The submission link should be up soon!

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Reposted by Matt McEwen

Earl Campbell @quantumearl.bsky.social · 15/10/2025

Coming out of social media hibernation to ask: Are you interested in hosting a future QEC conf? We are looking for detailed bids for QEC27 over the next month (provisional deadline 21st November). For more info: DM or email me. QEC26 will be in Santa Barbara

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Reposted by Matt McEwen

John Preskill @preskill.bsky.social · 07/10/2025

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...

nobelprize.org

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...

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Reposted by Matt McEwen

Craig Gidney @craiggidney.bsky.social · 02/10/2025

For their student researcher-ship, Satoshi Yoshida extended our work on dynamic surface code circuits to color codes. They built and simulated iswap color code circuits and wiggling color code circuits. The iswap circuits use fewer entangling layers than CX circuits! arxiv.org/abs/2510.00370

arxiv.org

Low Depth Color Code Circuits with CXSWAP gate

We present two new types of syndrome extraction circuits for the color code. Our first construction, which after [M. McEwen, D. Bacon, and C. Gidney, Quantum 7, 1172 (2023)] we call the semi-wiggling ...

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Reposted by Matt McEwen

Stephen Bartlett @bartlettquantum.bsky.social · 12/08/2025

Very exciting announcement, the next Quantum Error Correction conference QEC26 will be hosted by Google 7-12 June 2026 in Santa Barbara. See you there! @dripto.bsky.social @mattmcewen.bsky.social

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Matt McEwen @matt.mcewen.xyz · 12/08/2025

Check out our new work on how to make the surface code on a hexagonal grid robust to dead components: www.arxiv.org/abs/2508.08116 It turns out adding weight-1 checks to LUCI gives you a lot of new freedom!

arxiv.org

Handling fabrication defects in hex-grid surface codes

Recent work has shown that a hexagonal grid qubit layout, with only three couplers per qubit, is sufficient to implement the surface code with performance comparable to that of a traditional four-coup...

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Matt McEwen @matt.mcewen.xyz · 08/05/2025

My fav new features are the glorious I_ERROR, II, and II_ERROR instructions. While on their face they seem nuts, they're really helpful for representing operations that stim can't simulate, but can still know are noisy or have 2Q targets. I_ERROR[LEAKAGE](p) anyone?

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Reposted by Matt McEwen

Steve Flammia @sflammia.bsky.social · 11/01/2025

Submissions for QEC 2025 are now open through March 28. This will easily be the most exciting conference on quantum error correction yet! Conference homepage: qec25.yalepages.org EasyChair submission page: easychair.org/my/conferenc...

qec25.yalepages.org

QEC25

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Matt McEwen @matt.mcewen.xyz · 04/01/2025

I definitely have a favorite way of implementing MZZ, and it's lattice surgery on surface codes.

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Matt McEwen @matt.mcewen.xyz · 20/12/2024

Along with our recent experimental work demonstrating color codes embedded on a square lattice arxiv.org/abs/2412.14256 and our work proposing new circuits for adapting to dead qubits and couplers arxiv.org/abs/2410.14891, this shows that we have a huge space of circuit constructions to explore!

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Matt McEwen @matt.mcewen.xyz · 20/12/2024

Each of these circuits present a new possibility to design an architecture around. That all three work well on a device not optimized for them proves we have what @craiggidney.bsky.social calls “circuit agility”, like cryptographic agility but for QEC implementation. Same QEC, different circuit!

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Matt McEwen @matt.mcewen.xyz · 20/12/2024

It was also long assumed that you need to use CNOTs or CZ gates to do QEC. We demonstrate the surface code compiled to iSWAP gates, which is more natural for transmons and doesn’t couple to leakage states! Our device was optimized for CZs, the iSWAPS do suffer from a lot of stray CPHASE error…

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Matt McEwen @matt.mcewen.xyz · 20/12/2024

We also demonstrate a walking circuit, switching which physical qubits we use to measure the syndromes. Physically, this lets us remove leakage on all qubits every 2 rounds. Logically, it moved the whole patch diagonally through space.

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Matt McEwen @matt.mcewen.xyz · 20/12/2024

It’s long been assumed you need a square grid of nearest neighbour connections to do the surface code. Turns out three couplings is plenty! As in our recent work arxiv.org/abs/2408.13687, we show that scaling the distance for the hexagonal circuit from distance 3 to 5 halves the logical error.

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Matt McEwen @matt.mcewen.xyz · 20/12/2024

These circuits are all based on the detecting region approach to QEC arxiv.org/abs/2302.02192 As long as these regions tile spacetime, the QEC works, which gives you huge freedom to modify the circuit. It's a treat to work on theory for something and then get to work on the experiment.

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Matt McEwen @matt.mcewen.xyz · 20/12/2024

Circuits Galore! Check out our latest work demonstrating three new circuits for implementing the surface code: arxiv.org/abs/2412.14360 They all perform well below threshold on a device optimised for the standard surface code, but they each open up wild new possibilities for devices.

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Reposted by Matt McEwen

juliankelly.bsky.social @juliankelly.bsky.social · 09/12/2024

🌳 Excited to introduce Willow, Google Quantum AI’s latest chip. Willow 5x’s coherence times, beats the Surface Code QEC threshold, and the time to reproduce Willow's RCS on Frontier supercomputer is estimated at 10^25 years⏳! 👇 thread #Quantum #Physics #Science blog.google/technology/r...

blog.google

Meet Willow, our state-of-the-art quantum chip

Our new quantum chip demonstrates error correction and performance that paves the way to a useful, large-scale quantum computer.

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