I was looking at this paper by FaulknerLewkowyczMaldacena. They give a very interesting proposal of calculating one loop (i.e, 1/N) correction to EE from computing the EE between the bulk regions. The proposal is really fascinating. But I didn't quite realize few things.

What was the motivation behind this proposal? I mean why should one expect that 'this quantity' must be 1/N corrections?

What exactly one has to compute in the bulk geometry? They have some examples in the paper but I couldn't understand how to calculate the EE between bulk regions. Can someone refer to some articles where some concrete calculations have been done in this direction?
This post imported from StackExchange Physics at 20150825 07:22 (UTC), posted by SEuser pinu