Tuesday, October 2, 2018 - 3:45pm
Event Date Details:
Refreshments served at 3:30pm
It is a famous question in black hole physics whether information that falls into a black hole can get out again. However, even if there is a way to extract the information in principle, it may be very hard to do so in practice! Thus, in order to explain why black holes obey a Second Law of Thermodynamics, we need to be able to give an account of how we deal with information being effectively lost. This requires us to use a technique known as "coarse graining", where we forget some of the information in the system. I will review the Jaynesian approach to coarse graining in ordinary (nongravitational) statistical systems. I will then explain how the same methods can be applied to black holes, using recent developments based on the holographic principle in quantum gravity. The result will be to give a statistical mechanical explanation for why the area of a black hole increases. Based on recent work with Netta Engelhardt.
Talk starts at ***3:45pm****
September 27, 2018 - 3:03pm