Dear quanta, Tomorrow at 11am, Chris will tell us about his recent work at the intersection of quantum information and quantum gravity. Details below. https://mit.zoom.us/j/97943342302 Title: How one-shot quantum Shannon theory saved holography Abstract: The ``quantum extremal surface'' prescription is the holographic method for computing von Neumann entropy, crucial for many of the most important results in holography. I will show that, as historically formulated, this prescription leads to contradictions, which I then make sense of and resolve with tools of one-shot quantum Shannon theory, leading to a refined prescription. If I have time, I will explain a tightly connected result, that “entanglement wedge reconstruction,” an important map from operators in gravity to operators in the CFT, is a special case of one-shot quantum state merging. https://arxiv.org/abs/2008.03319 -aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip