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# Black Hole Entropy from Soft Hair

Black Hole Entropy is a well established concept and arises naturally once one realises that black holes are characterised by a temperature. Boltzmann established that entropy can be regarded as the logarithm of the density of states function. However, black hole uniqueness theorems appeared to indicate that black holes have no hair. I will describe a loophole in the no-hair theorems and how black holes can have an infinite set of charges related to "large" gauge transformations. I will then use these ideas to show that on sections of the horizon there is a holographic conformal field theory. The temperature of this conformal theory means that it has a statistical entropy that reproduces the Hawking formula. The implications of this for the black hole information paradox will be briefly described.

COVID-19 information for PI Residents and Visitors

Collection/Series:
Event Type:
Seminar
Scientific Area(s):
Speaker(s):
Event Date:
Thursday, October 17, 2019 - 11:00 to 12:30
Location:
Bob Room
Room #:
405