John Preskill

I'm at the Stellenbosch Institute for Advanced Study in South Africa for the Nobel Symposium on Quantum Computing. Looking forward to a fun and exciting week. www.stias.ac.za/events/nobel...

Student @caltech.edu Saleh Naghdi urges scientists to create short videos that explain their work. An example: this 1.5-minute video abstract for his recent paper on simulation of quantum spin systems. quantumfrontiers.com/2026/10/19/e...

Student @reionize.bsky.social @caltech.edu ponders the value of PhD training in the AI era. quantumfrontiers.com/2026/10/17/l...

My talk last week at the Quantum World Congress, a 20-minute overview of recent highlights in quantum computing. www.youtube.com/watch?v=YYjK...

The head that invented the surface code wears a hat that displays it.

Very articulate mathematicians pondering the future of math. www.quantamagazine.org/live-from-ic...

Interesting chat: Jacob Tsimerman talks to Curt Jaimungal about how AI is changing mathematics. www.youtube.com/watch?v=6uIJ...

Thoughtful discussion @simonsinstitute.bsky.social led by Robert Huang on the topic researchers everywhere are talking about: How to respond to the automation of research? www.youtube.com/watch?v=vT5b...

My friend Mark Wise quantumfrontiers.com/2026/07/18/m...

Mark Wise 1953-2026. Hero of theoretical particle physics, master of effective field theory, much loved teacher, mentor, and colleague, my best friend for over 40 years. An immeasurable loss.

Today, Caltech and JPL welcome renowned astrophysicist, acclaimed author, and transformative leader, Ray Jayawardhana as the Institute’s tenth president! He brings a fierce commitment to building on Caltech’s legacy of discovery and exploration. Welcome to the frontier, RayJay! l1nq.com/uci46q8

On Wednesday we dedicated @caltech.edu’s Ginsburg Center for Quantum Precision Measurement. We won’t be moving in for a few more months, but it’s going to be a beautiful facility. We're very grateful to the generous donors who made this possible. It was a great day. www.caltech.edu/about/news/g...

We thought that Senator Adam Schiff would want to hear about how quantum computing will benefit the world. But actually he is just really, really curious about quantum entanglement (and knows a lot about it)! Thanks for visiting @caltech.edu, Senator. It was fun. www.youtube.com/watch?v=gWhL...

I'm quite amazed, and deeply honored, to see my name on this distinguished list of "AI Pioneers." Thank you, Boston Global Forum and AI World Society, for recognizing that quantum science can contribute to "an age of human flourishing." bostonglobalforum.org/publication/...

From dream to reality: The bridge connecting quantum information and matter to high energy physics @caltech.edu now exists.

Wise words from Garnet Chan on quantum computing and chemistry. www.newquantumera.com/podcast/quan...

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

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...

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.

With characteristic attention to detail, @nicoleyh11.bsky.social offers guidance on handling faculty offers. quantumfrontiers.com/2026/03/11/n...

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...

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

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...

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.

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...

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...

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...

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

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...

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

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...

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...

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...

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...

"... 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!

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...