Fascinating article by Feynman (1987). He discusses three issues in the article: 1) sensitivity, 2) extensivity, and 3) computability.

In 1956, it was found for the first time that there are fundamental interactions in nature (weak interactions) that violate parity symmetry (left and right are not alike). Curiously enough, it was only today that I found out that Dirac had this sentence in his July 1949 RMP article.

Long live Verschränkung
Great finish to the talk by John @preskill.bsky.social

#APSSummit25

First page of the book - "Notes on quantum mechanics" by E. Fermi published by Chicago U Press.

Thanks to @thriftbooks.bsky.social for a great deal :-)

Happy to announce that our paper on real-time scattering in Ising field theory using tensor networks is now on arXiv.

Great working and learning with Ashley Milsted, Dominik Neuenfeld, John Preskill (@preskill.bsky.social), and Pedro Vieira. We had great fun!

arxiv.org/abs/2411.13645