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