Steven Touzard
@steventouzard.bsky.social
Quantum Physicist and Engineer at Singapore’s Centre for Quantum Technology and National University of Singapore.
Reposted by Steven Touzard
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.
February 13, 2025 at 11:52 PM
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.
Reposted by Steven Touzard
The startup, launched in 2020, is focusing on improving its devices before it enters a commercialisation phase.
#QuantumComputing #StartupEurope
#QuantumComputing #StartupEurope
Quantum computing startup Alice & Bob raises 100m Series B to double down on R&D and open new production site
sifted.eu
January 29, 2025 at 2:00 PM
The startup, launched in 2020, is focusing on improving its devices before it enters a commercialisation phase.
#QuantumComputing #StartupEurope
#QuantumComputing #StartupEurope
Reposted by Steven Touzard
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...
www.nature.com/articles/s41...
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...
www.nature.com
January 29, 2025 at 6:57 PM
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...
www.nature.com/articles/s41...
Basic applied topology problem with Xanadu stickers
January 14, 2025 at 4:06 AM
Basic applied topology problem with Xanadu stickers
Reposted by Steven Touzard
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 👇
Links below 👇
January 8, 2025 at 2:59 AM
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 👇
Links below 👇
Reposted by Steven Touzard
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)
December 21, 2024 at 5:38 PM
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)
Reposted by Steven Touzard
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
The color code: arxiv.org/abs/2412.14256
Dynamic surface codes: arxiv.org/abs/2412.14360
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...
arxiv.org
December 20, 2024 at 4:05 AM
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
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.
A new architecture for measuring superconducting qubits has been introduced, achieving a measurement fidelity of 99.9%. It employs the longitudinal interaction scheme between qubits and resonators.
arxiv.org/abs/2412.13849
arxiv.org/abs/2412.13849
99.9%-fidelity in measuring a superconducting qubit
Despite the significant progress in superconducting quantum computation over the past years, quantum state measurement still lags nearly an order of magnitude behind quantum gate operations in speed a...
arxiv.org
December 19, 2024 at 11:21 PM
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.
Reposted by Steven Touzard
Here is the referee report for that paper. :) Same would apply here.
December 19, 2024 at 2:37 PM
Here is the referee report for that paper. :) Same would apply here.
Reposted by Steven Touzard
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...
physicsworld.com/a/two-advanc...
Two advances in quantum error correction share the Physics World 2024 Breakthrough of the Year – Physics World
Complementary research brings practical quantum computing closer
physicsworld.com
December 19, 2024 at 7:24 PM
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...
physicsworld.com/a/two-advanc...
Reposted by Steven Touzard
Great timeline of quantum supremacy claims and refutations by Tom Wong on X.
x.com/thomasgwong/...
x.com/thomasgwong/...
December 17, 2024 at 11:47 AM
Great timeline of quantum supremacy claims and refutations by Tom Wong on X.
x.com/thomasgwong/...
x.com/thomasgwong/...
Reposted by Steven Touzard
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! 😇
December 16, 2024 at 2:01 AM
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)
December 12, 2024 at 12:22 AM
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)
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
- 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
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…
scottaaronson.blog
December 11, 2024 at 1:34 AM
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
- 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
Reposted by Steven Touzard
Check out Willow, our latest chip from Google Quantum AI!
🌳 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/technology/r...
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.
blog.google
December 10, 2024 at 6:05 PM
Check out Willow, our latest chip from Google Quantum AI!
Reposted by Steven Touzard
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 🥳
December 9, 2024 at 3:39 AM
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 🥳
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...
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.
www.quantamagazine.org
December 10, 2024 at 5:22 AM
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...
Here is some personal anecdote regarding this precise Quanta article👇🏻
www.quantamagazine.org/quantum-comp...
Reposted by Steven Touzard
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...
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.
www.quantamagazine.org
December 9, 2024 at 7:04 PM
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...
www.quantamagazine.org/quantum-comp...
Reposted by Steven Touzard
Thanks for highlighting our work!
Reinforcement learning can be used to improve qubit readout in superconducting devices. Additionally, the predicted readout pulse can be practically implemented.
arxiv.org/abs/2412.04053
arxiv.org/abs/2412.04053
Demonstration of Enhanced Qubit Readout via Reinforcement Learning
Measurement is an essential component for robust and practical quantum computation. For superconducting qubits, the measurement process involves the effective manipulation of the joint qubit-resonator...
arxiv.org
December 7, 2024 at 7:47 AM
Thanks for highlighting our work!
Reposted by Steven Touzard
Today #quantum arXiv selection: Single qubit gates errors at 10^-7 level, mapping for wavepacket dynamics, enhanced qubit readout via reinforcement learning, Bayesian quantum amplitude estimation, and optimized molecular vibrational dynamic.
More details and links below:
More details and links below:
December 6, 2024 at 3:01 PM
Today #quantum arXiv selection: Single qubit gates errors at 10^-7 level, mapping for wavepacket dynamics, enhanced qubit readout via reinforcement learning, Bayesian quantum amplitude estimation, and optimized molecular vibrational dynamic.
More details and links below:
More details and links below:
Hey this is Yvonne’s work, check it out!
Reinforcement learning can be used to improve qubit readout in superconducting devices. Additionally, the predicted readout pulse can be practically implemented.
arxiv.org/abs/2412.04053
arxiv.org/abs/2412.04053
Demonstration of Enhanced Qubit Readout via Reinforcement Learning
Measurement is an essential component for robust and practical quantum computation. For superconducting qubits, the measurement process involves the effective manipulation of the joint qubit-resonator...
arxiv.org
December 6, 2024 at 9:53 PM
Hey this is Yvonne’s work, check it out!
Reposted by Steven Touzard
Mark your calendars!
The second big lecture series of the term on #quantum #science and #technology at @ethzurich.bsky.social will be given by one of the pioneers of mesoscopic physics and superconducting quantum circuits Michel Devoret.
- math.ethz.ch/news-and-eve...
Hope to see you there.
The second big lecture series of the term on #quantum #science and #technology at @ethzurich.bsky.social will be given by one of the pioneers of mesoscopic physics and superconducting quantum circuits Michel Devoret.
- math.ethz.ch/news-and-eve...
Hope to see you there.
December 6, 2024 at 6:48 PM
Mark your calendars!
The second big lecture series of the term on #quantum #science and #technology at @ethzurich.bsky.social will be given by one of the pioneers of mesoscopic physics and superconducting quantum circuits Michel Devoret.
- math.ethz.ch/news-and-eve...
Hope to see you there.
The second big lecture series of the term on #quantum #science and #technology at @ethzurich.bsky.social will be given by one of the pioneers of mesoscopic physics and superconducting quantum circuits Michel Devoret.
- math.ethz.ch/news-and-eve...
Hope to see you there.
Reposted by Steven Touzard
Max Geier, Frederik Nathan
Self-correcting GKP qubit in a superconducting circuit with an oscillating voltage bias
https://arxiv.org/abs/2412.03650
Self-correcting GKP qubit in a superconducting circuit with an oscillating voltage bias
https://arxiv.org/abs/2412.03650
December 6, 2024 at 8:31 AM
Max Geier, Frederik Nathan
Self-correcting GKP qubit in a superconducting circuit with an oscillating voltage bias
https://arxiv.org/abs/2412.03650
Self-correcting GKP qubit in a superconducting circuit with an oscillating voltage bias
https://arxiv.org/abs/2412.03650
Reposted by Steven Touzard
Alice & Bob has released its new quantum roadmap.
alice-bob.com/wp-content/u...
alice-bob.com/wp-content/u...
alice-bob.com
December 4, 2024 at 6:29 PM
Alice & Bob has released its new quantum roadmap.
alice-bob.com/wp-content/u...
alice-bob.com/wp-content/u...
Reposted by Steven Touzard
Hi all!
I just uploaded my recently defended thesis, I hope you like it. Hit me up if you want to chat about anything GKP/QEC or life. :)
arxiv.org/abs/2412.02442
I just uploaded my recently defended thesis, I hope you like it. Hit me up if you want to chat about anything GKP/QEC or life. :)
arxiv.org/abs/2412.02442
The fabulous world of GKP codes
Quantum error correction is an essential ingredient in the development of quantum technologies. Its subject is to investigate ways to embed quantum Hilbert spaces into a physical system such that this...
arxiv.org
December 4, 2024 at 9:56 AM
Hi all!
I just uploaded my recently defended thesis, I hope you like it. Hit me up if you want to chat about anything GKP/QEC or life. :)
arxiv.org/abs/2412.02442
I just uploaded my recently defended thesis, I hope you like it. Hit me up if you want to chat about anything GKP/QEC or life. :)
arxiv.org/abs/2412.02442