Lecture 17: Entanglement entropy in holographic CFTs
In this lecture, we discussed the prescription for computing entanglement entropy in holographic CFTs. We worked out a simple example of a minimal area surface in AdS3 and found an answer that matches the known answer for the entropy of an interval in a 1+1 dimensional CFT. We also discussed subregion duality, which is the idea that a region on the boundary has information about its entanglement wedge in the bulk. The entanglement wedge may be much larger than the causal wedge and this can be seen even in empty AdS when we take the boundary region to be a union of two large-enough intervals.
