John Preskill
@preskill.bsky.social
Caltech theoretical physicist
The Institute for Quantum Information (and Matter) @caltech.edu is celebrating its 25th anniversary. It has been a great run so far, and quantum information science is more fun now than ever!
www.caltech.edu/about/news/c...
www.caltech.edu/about/news/c...
Caltech's Pioneering Quantum Hub Celebrates 25 Years
John Preskill reflects on the history and impact of IQIM
www.caltech.edu
November 6, 2025 at 1:34 AM
The Institute for Quantum Information (and Matter) @caltech.edu is celebrating its 25th anniversary. It has been a great run so far, and quantum information science is more fun now than ever!
www.caltech.edu/about/news/c...
www.caltech.edu/about/news/c...
The DOE National Quantum Information Science Research Centers continue their mission.
www.energy.gov/articles/ene...
www.energy.gov/articles/ene...
Energy Department Announces $625 Million to Advance the Next Phase of National Quantum Information Science Research Centers
The U.S. Department of Energy today announced $625 million in funding to renew its five National Quantum Information Science Research Centers.
www.energy.gov
November 4, 2025 at 6:35 PM
The DOE National Quantum Information Science Research Centers continue their mission.
www.energy.gov/articles/ene...
www.energy.gov/articles/ene...
"... physicists adore apparent contradictions ..."
Yes we do! Doesn't everyone?
quantumfrontiers.com/2025/10/26/t...
Yes we do! Doesn't everyone?
quantumfrontiers.com/2025/10/26/t...
The sequel
This October, fantasy readers are devouring a sequel: the final installment in Philip Pullman’s trilogy The Book of Dust. The series follows student Lyra Silvertongue as she journeys from Oxford to…
quantumfrontiers.com
November 4, 2025 at 12:09 AM
"... physicists adore apparent contradictions ..."
Yes we do! Doesn't everyone?
quantumfrontiers.com/2025/10/26/t...
Yes we do! Doesn't everyone?
quantumfrontiers.com/2025/10/26/t...
The annual retreat of @caltech.edu's Institute for Quantum Information and Matter (IQIM) is an opportunity to spend the weekend with some of my favorite scientists. It is always an uplifting and illuminating experience.
November 1, 2025 at 8:53 PM
The annual retreat of @caltech.edu's Institute for Quantum Information and Matter (IQIM) is an opportunity to spend the weekend with some of my favorite scientists. It is always an uplifting and illuminating experience.
Now under construction: The bridge connecting research on quantum matter and quantum information in the Ginsburg Center @caltech.edu to the high energy theory group in Downs-Lauritsen Laboratory. Exciting!
October 29, 2025 at 5:13 PM
Now under construction: The bridge connecting research on quantum matter and quantum information in the Ginsburg Center @caltech.edu to the high energy theory group in Downs-Lauritsen Laboratory. Exciting!
When and how will quantum computing broadly benefit humanity? Despite exhilarating recent progress, we still don’t know. Here my friend Jens Eisert and I assess the current status and the challenges ahead.
arxiv.org/abs/2510.19928
arxiv.org/abs/2510.19928
Mind the gaps: The fraught road to quantum advantage
Quantum computing is advancing rapidly, yet substantial gaps separate today's noisy intermediate-scale quantum (NISQ) devices from tomorrow's fault-tolerant application-scale (FASQ) machines. We ident...
arxiv.org
October 24, 2025 at 4:40 AM
When and how will quantum computing broadly benefit humanity? Despite exhilarating recent progress, we still don’t know. Here my friend Jens Eisert and I assess the current status and the challenges ahead.
arxiv.org/abs/2510.19928
arxiv.org/abs/2510.19928
Aside from Yang-Mills theory and parity nonconservation, Yang made so many profound contributions to physics! One that deeply impressed me as I was starting grad school: a 1975 paper with T. T. Wu highlighting the role of fiber bundles in gauge theory.
www.nytimes.com/2025/10/18/s...
www.nytimes.com/2025/10/18/s...
Chen Ning Yang, Nobel-Winning Physicist, Is Dead at 103
www.nytimes.com
October 19, 2025 at 5:53 PM
Aside from Yang-Mills theory and parity nonconservation, Yang made so many profound contributions to physics! One that deeply impressed me as I was starting grad school: a 1975 paper with T. T. Wu highlighting the role of fiber bundles in gauge theory.
www.nytimes.com/2025/10/18/s...
www.nytimes.com/2025/10/18/s...
Thanks, Ingrid Fadelli, for this nice article about our recently published paper with Robert Huang and Mehdi Soleimanifar. The paper describes a surprisingly simple protocol for verifying that a many-qubit state in the lab matches a desired target state.
phys.org/news/2025-10...
phys.org/news/2025-10...
Rigorous approach quantifies and verifies almost all quantum states
Quantum information systems, systems that process, store or transmit information leveraging quantum mechanical effects, could, in principle, outperform classical systems in some optimization, computat...
phys.org
October 17, 2025 at 4:55 PM
Thanks, Ingrid Fadelli, for this nice article about our recently published paper with Robert Huang and Mehdi Soleimanifar. The paper describes a surprisingly simple protocol for verifying that a many-qubit state in the lab matches a desired target state.
phys.org/news/2025-10...
phys.org/news/2025-10...
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...
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
October 7, 2025 at 2:35 PM
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...
www.nobelprize.org/prizes/physi...
6,100 neutral-atom qubits trapped in a grid by lasers @caltech.edu ... is a lot.
www.caltech.edu/about/news/c...
www.caltech.edu/about/news/c...
Caltech Team Sets Record with 6,100-Qubit Array
The neutral-atom platform shows promise for scaling up quantum computers.
www.caltech.edu
September 25, 2025 at 8:18 PM
6,100 neutral-atom qubits trapped in a grid by lasers @caltech.edu ... is a lot.
www.caltech.edu/about/news/c...
www.caltech.edu/about/news/c...
I’m deeply honored to receive the 2025 Academic Pioneer of the Year Award from the Quantum World Congress. Curiosity-driven fundamental research revealed the promise of quantum science and technology, and will be just as vital for future advances.
quantumfrontiers.com/2025/09/18/j...
quantumfrontiers.com/2025/09/18/j...
John Preskill receives 2025 Quantum Leadership Award
The 2025 Quantum Leadership Awards were announced at the Quantum World Congress on 18 September 2025. Upon receiving the Academic Pioneer of the Year Award, John Preskill made these remarks. I’m en…
quantumfrontiers.com
September 18, 2025 at 5:12 PM
I’m deeply honored to receive the 2025 Academic Pioneer of the Year Award from the Quantum World Congress. Curiosity-driven fundamental research revealed the promise of quantum science and technology, and will be just as vital for future advances.
quantumfrontiers.com/2025/09/18/j...
quantumfrontiers.com/2025/09/18/j...
The Ginsburg Center for Quantum Precision Measurement @caltech.edu now stands 4 stories high. Opens summer 2026.
August 28, 2025 at 11:52 PM
The Ginsburg Center for Quantum Precision Measurement @caltech.edu now stands 4 stories high. Opens summer 2026.
The QEC25 conference hosted by @yaleqi.bsky.social was really excellent, and videos of all talks are available. So much recent progress on quantum error correction!
qec25.yalepages.org
qec25.yalepages.org
QEC25
qec25.yalepages.org
August 17, 2025 at 5:32 PM
The QEC25 conference hosted by @yaleqi.bsky.social was really excellent, and videos of all talks are available. So much recent progress on quantum error correction!
qec25.yalepages.org
qec25.yalepages.org
We’re excited to propose and validate simple methods for preparing ground states and thermal states of many-particle quantum systems, which might be feasible for early fault-tolerant quantum devices. All the credit goes to my brilliant collaborators Zhiyan, Yongtao, and Lin
arxiv.org/abs/2508.05703
arxiv.org/abs/2508.05703
End-to-End Efficient Quantum Thermal and Ground State Preparation Made Simple
We propose new quantum algorithms for thermal and ground state preparation based on system-bath interactions. These algorithms require only forward evolution under a system-bath Hamiltonian in which t...
arxiv.org
August 11, 2025 at 2:02 AM
We’re excited to propose and validate simple methods for preparing ground states and thermal states of many-particle quantum systems, which might be feasible for early fault-tolerant quantum devices. All the credit goes to my brilliant collaborators Zhiyan, Yongtao, and Lin
arxiv.org/abs/2508.05703
arxiv.org/abs/2508.05703
The infectious enthusiasm of my wonderful co-authors (Robert Huang, Soonwon Choi, Jarrod McClean) drove this upbeat assessment of “The Vast World of Quantum Advantage.”
arxiv.org/abs/2508.05720
arxiv.org/abs/2508.05720
The vast world of quantum advantage
The quest to identify quantum advantages lies at the heart of quantum technology. While quantum devices promise extraordinary capabilities, from exponential computational speedups to unprecedented mea...
arxiv.org
August 11, 2025 at 1:56 AM
The infectious enthusiasm of my wonderful co-authors (Robert Huang, Soonwon Choi, Jarrod McClean) drove this upbeat assessment of “The Vast World of Quantum Advantage.”
arxiv.org/abs/2508.05720
arxiv.org/abs/2508.05720
Talking quantum with Brian.
www.youtube.com/watch?v=EKfs...
www.youtube.com/watch?v=EKfs...
The Quantum Frontier with Brian Greene and John Preskill
YouTube video by World Science Festival
www.youtube.com
August 9, 2025 at 2:26 PM
Talking quantum with Brian.
www.youtube.com/watch?v=EKfs...
www.youtube.com/watch?v=EKfs...
In our world of (noisy) data, error correction is everywhere, as Mary Wootters eloquently explains.
www.quantamagazine.org/how-can-math...
www.quantamagazine.org/how-can-math...
How Can Math Protect Our Data? | Quanta Magazine
Mary Wootters discusses how error-correcting codes work, and how they are essential for reliable communication and storage.
www.quantamagazine.org
August 8, 2025 at 11:45 PM
In our world of (noisy) data, error correction is everywhere, as Mary Wootters eloquently explains.
www.quantamagazine.org/how-can-math...
www.quantamagazine.org/how-can-math...
AI can improve the design of experiments. “It takes a lot to think this far outside of the accepted solution,” Adhikari said. “We really needed the AI.”
www.quantamagazine.org/ai-comes-up-...
www.quantamagazine.org/ai-comes-up-...
AI Comes Up with Bizarre Physics Experiments. But They Work. | Quanta Magazine
Artificial intelligence software is designing novel experimental protocols that improve upon the work of human physicists, although the humans are still “doing a lot of baby-sitting.”
www.quantamagazine.org
August 1, 2025 at 2:41 PM
AI can improve the design of experiments. “It takes a lot to think this far outside of the accepted solution,” Adhikari said. “We really needed the AI.”
www.quantamagazine.org/ai-comes-up-...
www.quantamagazine.org/ai-comes-up-...
Mark Saffman reviews the remarkable recent progress on quantum computing with neutral atoms.
podcast.newquantumera.com/57
podcast.newquantumera.com/57
The New Quantum Era - innovation in quantum computing, science and technology | Neutral Atom Qubits with Mark Saffman
In this episode of The New Quantum Era, host Sebastian Hassinger sits down with Dr. Mark Saffman, a leading expert in atomic physics and quantum information science. As a professor at the Universit...
podcast.newquantumera.com
July 29, 2025 at 6:07 PM
Mark Saffman reviews the remarkable recent progress on quantum computing with neutral atoms.
podcast.newquantumera.com/57
podcast.newquantumera.com/57
Chris Monroe recalls how fundamental research on atomic clocks led to quantum computing technologies.
www.youtube.com/watch?v=3B7z...
www.youtube.com/watch?v=3B7z...
Advances in Quantum Computing | Podcast
YouTube video by National Science Foundation News
www.youtube.com
July 29, 2025 at 5:56 PM
Chris Monroe recalls how fundamental research on atomic clocks led to quantum computing technologies.
www.youtube.com/watch?v=3B7z...
www.youtube.com/watch?v=3B7z...
A touching tribute to an inspiring teacher from a grateful former student.
quantumfrontiers.com/2025/07/27/l...
quantumfrontiers.com/2025/07/27/l...
Little ray of sunshine
A common saying goes, you should never meet your heroes, because they’ll disappoint you. But you shouldn’t trust every common saying; some heroes impress you more, the better you know them. Ray Laf…
quantumfrontiers.com
July 28, 2025 at 2:35 AM
A touching tribute to an inspiring teacher from a grateful former student.
quantumfrontiers.com/2025/07/27/l...
quantumfrontiers.com/2025/07/27/l...
Hirosi Ooguri takes the reins of the PMA Division @caltech.edu. Fiona Harrison was a great Chair, and I'm sure Hirosi will be a worthy successor.
www.caltech.edu/about/news/n...
www.caltech.edu/about/news/n...
New PMA Chair Announced
Physicist Hirosi Ooguri will become the next chair of the Division of Physics, Mathematics and Astronomy.
www.caltech.edu
July 22, 2025 at 5:05 PM
Hirosi Ooguri takes the reins of the PMA Division @caltech.edu. Fiona Harrison was a great Chair, and I'm sure Hirosi will be a worthy successor.
www.caltech.edu/about/news/n...
www.caltech.edu/about/news/n...
Great dinner conversation with SURF students @caltech.edu! (SURF = Summer Undergraduate Research Fellowship).
July 18, 2025 at 3:29 AM
Great dinner conversation with SURF students @caltech.edu! (SURF = Summer Undergraduate Research Fellowship).
