John Preskill @preskill.bsky.social · 30/09/2026The head that invented the surface code wears a hat that displays it. 1301
John Preskill @preskill.bsky.social · 30/04/2026From dream to reality: The bridge connecting quantum information and matter to high energy physics @caltech.edu now exists. 1462
John Preskill @preskill.bsky.social · 12/03/2026Today 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. 0120
John Preskill @preskill.bsky.social · 11/02/2026Siblings: Three of my scientific "children" (Dariel Mok, Hui Khoon Ng, Hoi-Kwong Lo) gather in Singapore. I've been blessed with many wonderful students. 0120
John Preskill @preskill.bsky.social · 01/11/2025The 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. 0221
John Preskill @preskill.bsky.social · 29/10/2025Now 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! 2201
John Preskill @preskill.bsky.social · 29/08/2025The Ginsburg Center for Quantum Precision Measurement @caltech.edu now stands 4 stories high. Opens summer 2026. 0241
John Preskill @preskill.bsky.social · 18/07/2025Great dinner conversation with SURF students @caltech.edu! (SURF = Summer Undergraduate Research Fellowship). 071
John Preskill @preskill.bsky.social · 06/06/2025Yiyi Cai has done research in our group @caltech.edu for two years, including a senior thesis. She'll be a Gates Cambridge Scholar for a year, followed by PhD studies in computer science at Stanford. Congratulations, Yiyi, you'll be missed! 1451
John Preskill @preskill.bsky.social · 31/05/2025The building committee gets a first look at the basement of the Ginsburg Center for Quantum Precision Measurement at Caltech. We're standing where a tunnel will connect Ginsburg labs to labs in neighboring Downs Laboratory. With me are Nick Hutzler, Rana Adhikari, Michelle Effros, and Dave Hsieh. 2361
John Preskill @preskill.bsky.social · 03/05/2025A delightful evening at Caltech's Venerable House. 1130
John Preskill @preskill.bsky.social · 02/05/2025Thanking Ashvin Vishwanath for his brilliant Lauritsen Lecture @Caltech on "The Return of Anyons," with colleagues Hirosi Ooguri, Nai-Chang Yeh, and Lesik Motrunich. 2180
John Preskill @preskill.bsky.social · 06/04/2025Congratulations, Jeongwan Haah, recipient of the New Horizons in Physics Prize "for the discovery of Haah's code, in which fractal conservation laws emerge, and other models bringing discrete mathematical structures to physics"! breakthroughprize.org/News/91 0575
John Preskill @preskill.bsky.social · 21/03/2025With two of my students from the 1990s who made good: Hoi-Kwong Lo and Daniel Gottesman. #APSSummit25 1371
John Preskill @preskill.bsky.social · 26/02/2025Six our of eight randomly selected @qip2025.bsky.social attendees have been @caltech.edu as student, postdoc, or professor. 0201
John Preskill @preskill.bsky.social · 26/02/2025In 1999, I wrote a paper on "Quantum information and precision measurement" with two brilliant undergrads @caltech.edu, @joerenes.bsky.social and Andrew Childs. Here we are reunited @qip2025.bsky.social . (Former student @nickrhj.bsky.social is in the background.) 1312
John Preskill @preskill.bsky.social · 24/02/2025Over 900 participants today @qip2025.bsky.social. 1351
John Preskill @preskill.bsky.social · 23/01/2025I'm glad to be at the University of Maryland to celebrate 10 years of exciting scientific contributions from QuICS. And we're proud that 7 of the QuICS Fellows passed through Caltech as students and postdocs. 0275
John Preskill @preskill.bsky.social · 02/01/2025Citation counts continue to defy my expectations. scholar.google.com/citations?us... 0170
John Preskill @preskill.bsky.social · 08/12/2024We had so much fun in my first-year seminar “Quantum information science today and tomorrow;” I was blown away by the brilliance and enthusiasm of the students. L to R: Toby, Joel, Mitchell, Hardit, me, Max, Amudhan, Jason, Priyanka, Benjamin (all freshmen @caltech.edu ). 0330
John Preskill @preskill.bsky.social · 06/12/2024On November 15, I spoke about my PhD advisor Steve Weinberg at a conference in his honor at the University of Texas. Slides from my talk are here: preskill.caltech.edu/talks/Preski... 2524
John Preskill @preskill.bsky.social · 22/11/2024Using tensor network methods, we studied wave-packet collisions in Ising field theory. These pictures depict various processes that occur. Time is on the vertical axis and spatial position is on the horizontal axis. The colors show the energy density relative to the vacuum state. 150
John Preskill @preskill.bsky.social · 22/11/2024Among the Ultra-Quantum Matter mavens in Lake Arrowhead, CA with former students Jeongwan Haah and Isaac Kim and current postdoc @Caltech.edu Dan Ranard. 0340
John Preskill @preskill.bsky.social · 19/11/2024Future basement of the Ginsburg Center for Quantum Precision Measurement at Caltech. 3803
