PIRSA:19100078 Scientific Series Quantum Fields and Strings

DOI10.48660/19100078

Series: Colloquium

Perry, M. (2019). Black Hole Entropy from Soft Hair. Perimeter Institute. https://pirsa.org/19100078

Perry, Malcolm. Black Hole Entropy from Soft Hair. Perimeter Institute, Oct. 17, 2019, https://pirsa.org/19100078 

@misc{ pirsa_PIRSA:19100078,
  doi = {10.48660/19100078},
  url = {https://pirsa.org/19100078},
  author = {Perry, Malcolm},
  keywords = {Quantum Fields and Strings},
  language = {en},
  title = {Black Hole Entropy from Soft Hair},
  publisher = {Perimeter Institute},
  year = {2019},
  month = {oct},
  note = {PIRSA:19100078 see, \url{https://pirsa.org}}
}

Abstract

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.
 

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