Tired of black holes decohering your superpositions? Masses entangled with soft gravitons? Recover (a little) coherence today, in one (carefully controlled) step—*even after you’ve finished your superposition experiment!* With Jonah, Gautam Satishchandran, Bob Wald: arxiv.org/abs/2501.04773

Sometimes it’s just three friends hanging out in a recording booth. Check out Pok Man Tam telling Anirudh Prabhu and I about his work on quantum materials and his path through academia! open.spotify.com/episode/05NjTf…

It is 89 seconds to midnight. thebulletin.org/doomsday-clock/

Go Birds.

Congratulations to UChicago physicist Robert Wald for receiving the 2025 Albert Einstein Medal from the Albert Einstein Society! physicalsciences.uchicago.edu/news/article/r…

Wake up babe, new preprint just dropped Length dependence of waveform mismatch: a caveat on waveform accuracy Keefe Mitman, Stein, et al. arxiv.org/abs/2502.14025

An eavesdropper hiding inside of a black hole could still obtain information about quantum objects on its outside, a finding that reveals how effectively black holes destroy the quantum states near their event horizons. newscientist.com/article/247408…

I highly recommend you read this book to see what Eric Weinstein says about QG is total BS.

Bob Wald talking about our work with Daine Danielson on bulk locality and asymptotic states youtu.be/MJI4J3jxrbA?si…

Day 1! #GR24

One visitor is a seminar. Two visitors is a symposium. Always an enjoyable to catch up with Jonathan Oppenheim and Sougato Bose at UCL and attend the Summer Symposium on Quantum Information and Spacetime youtu.be/HX0KvMVvo60?fe…

🤦🏽‍♂️

"Carney says he would still bet that gravity is quantum, and sees this and other non-quantum explanations as a long shot. But, he says, the experiment is worth doing. 'You can seriously contemplate checking it. That, to me, is super exciting.' "

Atomic clock: old news Nuclear optical clock: ok, cool Nuclear x-ray clock: hell yes

I'm sad to report that Rainer (Rai) Weiss passed away yesterday at age 92. Rai developed the design for LIGO, he and Kip got it funded, trained countless researchers, and received the 2017 Nobel Prize. Rai always had time for students and treated us as equals.

Some reflections on some recent work by myself (in collaboration with Daine Danielson and Bob Wald) and others arxiv.org/abs/2508.20171

As promised... No, classical spacetime can’t produce entanglement. I can create entanglement by turning a knob on a laser, but the knob isn't mediating the entanglement. Is the knob "producing" the entanglement? open.substack.com/pub/superposer…

superposer.substack.com/p/no-classical…