I was fascinated by this theorem as a teenager, and I still find it remarkable. Full paper: pdfs.semanticscholar.org/1528/72f15e69e…

🧵: Every student of mathematics knows the famous story of Ramanujan and Hardy – but it seems that Rishi Sunak, Suella Braverman MP, and the Home Office have missed its crucial message. en.wikipedia.org/wiki/Srinivasa… 1/10

After our series of courses in order to prepare the ground for the conference, now it is time to show up! If you're interested in showing your work in a contributed talk or poster presentation, you can submit your abstract. Register here: bht50.github.io/registration/c…

New paper with Gautam Satishchandran and Bob Wald, giving an entirely local description of the decoherence of quantum superpositions by black holes. arxiv.org/abs/2407.02567. Thanks to lots of people (especially those in the acknowledgements), for all of the stimulating questions!

Nice popular science discussion of gravity-mediated entanglement experiments from PBS Spacetime, especially starting at 8:44 (though the whole video is worth a watch!) youtu.be/eAtbzhpI4Js?si… via YouTube

Thanks to ICTP-SAIFR for hosting such a wonderful conference on quantum gravity and tabletop experiments! youtu.be/33xBIbPQQ9k?si… via YouTube

Also check out Daine Danielson talking about our work on decoherence and black holes youtu.be/VBmO49JWzFw?si…

"... doing so would not explicitly prove that the gravitational wave is quantized. 'Could you make a classical gravitational wave that would produce the same signal? The answer is yes,' said Carney."

Decoherence of quantum superpositions by Reissner-Nordstr\"om black holes. arxiv.org/abs/2411.04734

[Strings 2025] Algebras in Quantum Field Theory and Gravity: An Overview Edward Witten Slides: drive.google.com/file/d/1g-S3XU… Video: youtube.com/watch?v=b5U59r…

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

Congratulations, Bob 😊

Joint April/March format for the American Physical Society meeting was, IMO, awesome. Would highly support it continuing. As someone working across the nominal april/march divide of fields, this took me from "I probably won't go to either of these meetings" to "this is worth the trip".

Thanks to Karmela Padavic-Callaghan (they/them) with New Scientist for the clear writeup of my upcoming work with Jonah Kudler-Flam and Gautam Satishchandran (paper to appear very soon)!

It costs nothing to teleport information into a black hole. arxiv.org/abs/2504.01058

5 Stages of Physics: Denial: quick calculation, 2 mins lezgo Anger: wtf, why won’t- oh, yeah, this stupid, wait what? Bargaining: ok I can’t get an exact solution but an approx. should do Depression: I’m awful at everything Acceptance: the mystery of the Universe humbles us all

Alien 1: "Unfortunately, the humans destroyed themselves by building unaligned silicon-based intelligence. But before they did so, they achieved gravitationally mediated entanglement." Alien 2: "And they were just made out of meat? Impressive."

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

Congratulations Bob and Gary!!! (and Gibbons and Kerr, too! Well done ICTP for selecting such a deserving group.)