Steven Touzard

🚨 Job alert! 🚨
The group of Principal Investigator @steventouzard.bsky.social is looking for a Research Fellow. The candidate will be part of a well-funded initiative to create quantum networks using Erbium ions in solid-state and integrated photonics.
📥 Apply: careers.nus.edu.sg/job/Research...

ArXiv quant-ph needs to be split up! Paul Ginsparg lists Daniel Gottesman's proposed subcategories at his @aspenphysics.bsky.social talk. He is looking for feedback: please reply, dm, or email.

Quantum computing startup Alice & Bob raises 100m Series B to double down on R&D and open new production site

The startup, launched in 2020, is focusing on improving its devices before it enters a commercialisation phase.

#QuantumComputing #StartupEurope

LDPC-cat codes for low-overhead quantum computing in 2D - Nature Communications Implementing full quantum error correction incurs a significant hardware overhead. Here, the authors propose a quantum computing architecture combining superconducting cat qubits with 2D local LDPC co...

Happy to share our work with @anthony-leverrier.bsky.social, @christophe.vuillot.info, Jérémie Guillaud and Mazyar Mirrahimi on the LDPC-cat architecture was published in Nature Communications! Thanks to the reviewers for their useful feedback
www.nature.com/articles/s41...

Basic applied topology problem with Xanadu stickers

What a brilliant start of the year with two experiments from @qcrew-sg.bsky.social published in PRX Quantum! Both are investigations we did using a single qubit coupled to a cavity in the standard bosonic cQED systems, which are small devices but such rich #quantum playgrounds!

Links below 👇

Black and white photo of Cécile in the 1940s or 50s. She is smiling and looking to the right of the camera. Her hair is short and she is wearing a collared blouse.

A black and white photo of Cécile take in her office at UT Austin in the early or mid 2000s. A blackboard with diagrams and a well-known file cabinet sit in the background. Cécile’s hair is short and she wears a floral print shirt.

Mathematical physicist Cécile DeWitt-Morette was born #OTD in 1922. She made foundational contributions to Feynman functional integrals, organized the first American conference on general relativity (important for gravitational waves), and started the Les Houches Summer School. 🧪 ⚛️ 👩‍🔬 (1/n)

Scaling and logic in the color code on a superconducting quantum processor Quantum error correction is essential for bridging the gap between the error rates of physical devices and the extremely low logical error rates required for quantum algorithms. Recent error-correctio...

We've been getting a lot of questions about alternate QEC codes, and are we looking into any? Yes! Here's experiments for two on Willow.

The color code: arxiv.org/abs/2412.14256

Dynamic surface codes: arxiv.org/abs/2412.14360

A disheartening paper, signed by an esteemed and admired researcher. The attempt to quote a record breaking number leads to an equivalent disappointment when you realize there is no attempt (and even dishonesty) regarding QNDness.

Here is the referee report for that paper. :) Same would apply here.

Two advances in quantum error correction share the Physics World 2024 Breakthrough of the Year – Physics World Complementary research brings practical quantum computing closer

Congratulations to all who contributed to the advances in quantum error correction recognized by the Physics World Breakthrough of the Year.

physicsworld.com/a/two-advanc...

Timeline of quantum supremacy claims and refutations.

Great timeline of quantum supremacy claims and refutations by Tom Wong on X.
x.com/thomasgwong/...

Yep, comment was meant for @boazhsan.bsky.social :)

There are ways to partially measure (weak measurement) and there are experiments showing the evolution during a “quantum jump” @zlatko-minev.bsky.social

Came here looking for the quantum crowd. Super excited to see the lively discussions on not only #quantumphysics but also #scicomm, #womeninSTEM, and many more. Here is my team @qcrew-sg.bsky.social and I, pleased to be here! 😇

These slides are great and seems to address all the clouds of Quantum Computing. Here are my (obviously) favorite ones as they highlight the clear vision of a few actors, starting 10 years ago now (and making great progress)

The Google Willow thing Yesterday I arrived in Santa Clara for the Q2B (Quantum 2 Business) conference, which starts this morning, and where I’ll be speaking Thursday on “Quantum Algorithms in 2024: How Should…

It is now official as it is on the blog. My summary:
- Excited for the QEC results
- Remember that computation claim cannot be verified classically, need better test algorithms for QC
- Funny Gil Kalai bit (although why platforming him? I had mostly forgotten him)

scottaaronson.blog?p=8525

Check out Willow, our latest chip from Google Quantum AI!

It was an amazing read, congrats on the result!

On a normal day, such results on blind quantum computing would definitely be a headline.

Our paper on distributed blind computing is out on Arxiv! In short: we performed gates on our spin qubits remotely using photons without our nodes knowing what we did - all thanks to distributed matter-light entanglement 🥳

(One last hidden one: the Quanta article author (Ben Brubaker) is also from our cohort, he does great work!)

This is terrific to see so many of them still working together. They are on a very exciting journey and I can’t wait to hear more from their adventures.

Check how many co-authors crossed his path at Yale. I’ve had the chance to work with some of these brilliant people, in particular Alec (co-author on the GKP in cQED paper) and Gabrielle Roberts, who worked with us on GKP as an undergraduate intern! Very happy to see them highlighted in the article!

Another name that will undoubtedly remain attached to the implementation of QEC will be Michel Devoret (now in the Google team publishing the result). Let me use this article to highlight his far-reaching influence.

The bibliography cites previous QEC results, mostly done at Yale (GKP and cats).

I think that in the future some people such as Kitaev will obviously be recognised for their astonishing insight towards QEC. We are starting to take the concept for granted, but the voluntary preservation of a manifold of quantum states should always induce a sense of wonder.

Quantum Computers Cross Critical Error Threshold | Quanta Magazine In a first, researchers have shown that adding more “qubits” to a quantum computer can make it more resilient. It’s an essential step on the long road to practical applications.

I am absolutely thrilled to see Google crushing milestones after milestones in quantum computing, in particular in quantum error correction! (Quickly leaving the NISQ era behind).

Here is some personal anecdote regarding this precise Quanta article👇🏻

www.quantamagazine.org/quantum-comp...

Quantum Computers Cross Critical Error Threshold | Quanta Magazine In a first, researchers have shown that adding more “qubits” to a quantum computer can make it more resilient. It’s an essential step on the long road to practical applications.

I was thrilled to hear about the surface code when Alexei Kitaev visited @caltech.edu in April 1997. It's heartening to see the hardware catching up with the theory of quantum error correction. There's still far to go but this is encouraging progress.
www.quantamagazine.org/quantum-comp...

Thanks for highlighting our work!

Oh I know this latter one! Thanks for mentioning it!

The reinforcement learning paper comes from our floor (Yvonne’s side) let us know what you think!