The path integral approach to the black hole information problem
Seminar Room 1, Newton Institute
The black hole information loss problem has been the focus of much debate for the past thirty years. I will review the path integral approach to the problem: how it can be seen that black holes evaporate (Hartle-Hawking) thus apparently destroying information and how the sum over (Euclidean) space-time topologies may lead to a recovery of the information (Maldacena, Hawking). I will also point out why this may not be the end of the story (Barbon-Rabinovici) and, time permitting, mention a related holographic black hole non-formation argument to solve the problem which I am working on with Germani and Ishibashi.