I'm looking forward to the Kavli Symposium tomorrow at the APS Global Physics Summit, where I'll speak about "The Road to Quantum Advantage."

summit.aps.org/events/MAR-X02

Quantum Cryptography Pioneers Win Turing Award | Quanta Magazine Charles Bennett and Gilles Brassard were recognized for their foundational work in quantum information science.

I'm thrilled that Charlie Bennett and Gilles Brassard have received the A. M. Turing Award for “their essential role in establishing the foundations of quantum information science and transforming secure communication and computing.” Congratulations!

www.quantamagazine.org/quantum-cryp...

The FeMo-cofactor and classical and quantum computing Recently, my coworkers and I put out a preprint “Classical solution of the FeMo-cofactor model to chemical accuracy and its implications’’ (Zhai et al. 2026). It is a bit unusual to write comm…

Garnet Chan reflects on recent progress using classical heuristics in computational quantum chemistry—and what it means for quantum computing. The lessons he draws can help to steer both classical and quantum approaches in scientifically productive directions.
quantumfrontiers.com/2026/03/12/t...

Today was the last meeting of our first-year seminar @caltech.edu: "Quantum information science today and tomorrow." I'm grateful to (from left to right) Andy, Jin, Fan, Ostap, Justin, Idil, Lily, Ella, and Ronald for their sparkling enthusiasm and many perceptive insights.

Nicole’s guide to navigating faculty-position offers It’s happening.  Your inbox registers an email from the chair of a faculty-hiring committee. With trembling fingers, you click on the message. “We were very impressed…we’re delighted to offer……

With characteristic attention to detail, @nicoleyh11.bsky.social
offers guidance on handling faculty offers.

quantumfrontiers.com/2026/03/11/n...

What is next in quantum advantage? We are now at an exciting point in our process of developing quantum computers and understanding their computational power: It has been demonstrated that quantum computers can outperform classical …

In the last post of a 3-part series, Dominik Hangleiter highlights the importance of efficient verification of quantum advantage, and assesses the prospects for achieving it soon.
quantumfrontiers.com/2026/02/28/w...

One Sum To Rule Them All: A Second Order Master Rate Sum Rule for Charm Decays We show that within the Standard Model any system of hadronic weak charm decays related by $U$-spin satisfies the following rate sum rule: (sum of CF and DCS CKM-free rates) divided by (sum of SCS CKM...

It's nice to find out that I'm still an influencer in particle theory:

"We thank John Preskill for suggesting the phrase “One Sum To Rule Them All,” which inspired the title of this paper."

arxiv.org/abs/2602.22320

Quantum cartography My husband and I visited the Library of Congress on the final day of winter break this year. In a corner, we found a facsimile of a hand-drawn map: the world as viewed by sixteenth-century European…

Interesting format for a review article. 24 brief chapters, each offering perspective from a small subset of the 69 authors on a particular topic.

quantumfrontiers.com/2026/02/11/q...

The Wandering Physicist | Alec Wilkinson Luis Alvarez brought a scientific pragmatism to many of the twentieth century’s greatest mysteries, including the secrets of pyramids, the Kennedy assassination, and the disappearance of the dinosaurs...

An engaging account of the remarkably rich scientific legacy of physicist Luis Alvarez.
www.nybooks.com/articles/202...

Siblings: Three of my scientific "children" (Dariel Mok, Hui Khoon Ng, Hoi-Kwong Lo) gather in Singapore. I've been blessed with many wonderful students.

John Preskill on NISQ, FTQC & Quantum's Future YouTube video by The Quantum Revolution

While attending the Q2B Silicon Valley conference in December, I had this enjoyable conversation with Antonella Navarro, host of The Quantum Revolution podcast.

www.youtube.com/watch?v=_Zas...

Has quantum advantage been achieved? Part 2: Considering the evidence Welcome back to: Has quantum advantage been achieved? In Part 1 of this mini-series on quantum advantage demonstrations, I told you about the idea of random circuit sampling (RCS) and the experimen…

In part 2 or a 3-part series, Dominik Hangleiter continues his thoughtful assessment of the evidence for quantum advantage in random-circuit-sampling experiments.
quantumfrontiers.com/2026/01/25/h...

Q2B25 Silicon Valley | John Preskill, Professor, California Institute of Technology YouTube video by QC Ware

Here's the video of my talk on December 10 at Q2B Silicon Valley, reviewing recent progress in quantum computing.

www.youtube.com/watch?v=_UoJ...

Congress Is Reversing Trump’s Steep Budget Cuts to Science

Encouraging news.

www.nytimes.com/2026/01/10/s...

Has quantum advantage been achieved? Recently, I gave a couple of perspective talks on quantum advantage, one at the annual retreat of the CIQC and one at a recent KITP programme. I started off by polling the audience on who believed …

Dominik Hangleiter weighs in with an informative post about a much debated question: Has quantum advantage been achieved? This is the first post in a three-part series.
quantumfrontiers.com/2026/01/06/h...

Can Quantum Computing Make Robots Smarter? YouTube video by The Quantum Kid

Ken Goldberg and I talked to The Quantum Kid about quantum computing and robots.
www.youtube.com/watch?v=hkb-...

Make use of time, let not advantage slip During the spring of 2022, I felt as though I kept dashing backward and forward in time.  At the beginning of the season, hay fever plagued me in Maryland. Then, I left to present talks in sou…

It's fun to describe quantum teleportation in terms of particles that move both forward and backward in time. And it's more than just fun: the intuition derived from that description can guide us to new applications.

quantumfrontiers.com/2025/12/14/m...

Quantum computing in the second quantum century On December 10, I gave a keynote address at the Q2B 2025 Conference in Silicon Valley. This is a transcript of my remarks. The slides I presented are here. The first century We are nearing the end …

Every December since 2017, I've delivered a keynote at Q2B Silicon Valley, commenting on recent progress in quantum computing. Here is what I said this time. It's been a good year for quantum.

quantumfrontiers.com/2025/12/26/q...

Can AI Predict the Quantum Universe? AI promises to revolutionize the way we do science, which raises a central technological question of our time: Can classical AI understand all natural phenomena, or are some fundamentally beyond it…

In predicting properties of electronic structure or deciphering signals produced by Nature, will classical artificial intelligence eat quantum's lunch? Here @robbieking1000.bsky.social considers the issue from the perspective of complexity theory.

quantumfrontiers.com/2025/12/11/c...

Caltech's Pioneering Quantum Hub Celebrates 25 Years John Preskill reflects on the history and impact of IQIM

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...

"... strengthening the quantum innovation ecosystem, accelerating discoveries that power next-generation technologies, and securing American leadership in quantum computing, hardware, and applications."

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.

The DOE National Quantum Information Science Research Centers continue their mission.
www.energy.gov/articles/ene...

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…

"... physicists adore apparent contradictions ..."
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.

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!

We are optimistic about the quantum future, but there's a lot of work to do.

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...

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

This one:
journals.aps.org/prd/pdf/10.1...

Chen Ning Yang, Nobel-Winning Physicist, Is Dead at 103

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...

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...

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...