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...

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

"... 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!

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

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...

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...

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...

6,100 neutral-atom qubits trapped in a grid by lasers @caltech.edu ... is a lot. 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...

The Ginsburg Center for Quantum Precision Measurement @caltech.edu now stands 4 stories high. Opens summer 2026.

Useful advice from @nicoleyh11.bsky.social. quantumfrontiers.com/2025/08/10/n...

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

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

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

Talking quantum with Brian. 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...

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-...

Mark Saffman reviews the remarkable recent progress on quantum computing with neutral atoms. podcast.newquantumera.com/57

Chris Monroe recalls how fundamental research on atomic clocks led to quantum computing technologies. www.youtube.com/watch?v=3B7z...

A touching tribute to an inspiring teacher from a grateful former student. 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...

Great dinner conversation with SURF students @caltech.edu⁩! (SURF = Summer Undergraduate Research Fellowship).

Encouraging. www.science.org/content/arti...

Mathematician @evamirandag.bsky.social expounds on undecidability in fluid mechanics. This is fun: It's about rubber duckies drifting in the ocean. www.youtube.com/watch?v=cgNp...

Andrew Houck, Director of the Co-Design Center for Quantum Advantage, makes an eloquent case for the value of the National Quantum Initiative Quantum Research Centers. Hey Congress, how's that reauthorization coming along?

Raymond Laflamme 1960-2025. A great scientist, renowned for his pioneering contributions to quantum error correction. A great leader, founding director of the Institute for Quantum Computing. A great colleague and teacher whose legacy continues to inspire us. uwaterloo.ca/institute-fo...

Yiyi 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!

The 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.

After a long hiatus, we are finally getting around to posting our coolest undertaking during the conference--interviews with some of the biggest names in our field about the early days of QIP! First in our lineup is our interview with the one and only John Preskill (@preskill.bsky.social)! (1/4)

Making quantum machines more autonomous might simplify the task of controlling them, and so ease the way to large-scale quantum computers that solve very hard problems. quantumfrontiers.com/2025/04/27/q...

A delightful evening at Caltech's Venerable House.

Thanking Ashvin Vishwanath for his brilliant Lauritsen Lecture @Caltech on "The Return of Anyons," with colleagues Hirosi Ooguri, Nai-Chang Yeh, and Lesik Motrunich.

If you are interested in quantum computing, I strongly recommend this insightful article by @caltech.edu student @robbieking1000.bsky.social calling for a "scrappier approach" to finding new applications. quantumfrontiers.com/2025/04/20/q...

Very interesting discussion with John Martinis about the challenge of scaling up superconducting quantum processors and the business plan of QoLab. share.transistor.fm/s/f599d74b

Students Haimeng Zhao and Yuzhen Zhang decided to revisit thermodynamics from the perspective of learning theory and computational complexity. The result was this fun project. arxiv.org/abs/2504.07341

Scientists often find that one gets a new idea by trying to explain something to someone else. This applies in particular to one who writes a popular book. [Note to self: write popular books.] quantumfrontiers.com/2025/03/30/h...

Congratulations, 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

Great interview in which Ewin Tang describes how she shook the quantum world at age 18.

Thoughtful perspective from Mark Kamionkowski and @seanmcarroll.bsky.social on recent evidence indicating that dark energy may have increased (!) as the universe evolved, and on the still unresolved "Hubble tension." www.preposterousuniverse.com/podcast/2025...

A fun chat with my friends Rob Schoelkopf and Sebastian Hassinger, recorded at the APS Global Physics Summit on March 17. share.transistor.fm/s/7ec0179e

I am having a great time at the DOE computer science PI meeting in Frisco, Texas. A wide range of wonderful talks, posters, and people. I greatly enjoyed the talk on quantum computing by @preskill.bsky.social. A longer version is at www.youtube.com/watch?v=TIQq...

Quanta Magazine reports on the beautiful recent construction of pseudorandom unitaries by Robert Huang and Fermi Ma.

With two of my students from the 1990s who made good: Hoi-Kwong Lo and Daniel Gottesman. #APSSummit25

Here, among other cool analytic & numerical results, we prove that weakly interacting spin & fermionic systems can be rapidly cooled to their ground states & that quantum algorithms simulating the cooling process prepare the ground states very efficiently. arxiv.org/abs/2503.15827

My speech at the #APSSummit25 recognizing the International Year of Quantum: "The first and second centuries of quantum mechanics" quantumfrontiers.com/2025/03/20/t...