PIRSA:20040031 Scientific Series Quantum Fields and Strings

DOI10.48660/20040031

Series: Quantum Fields and Strings

Shaghoulian, E. (2020). Replica wormholes and the black hole information paradox . Perimeter Institute. https://pirsa.org/20040031

Shaghoulian, Edgar. Replica wormholes and the black hole information paradox . Perimeter Institute, Apr. 21, 2020, https://pirsa.org/20040031 

@misc{ pirsa_PIRSA:20040031,
  doi = {10.48660/20040031},
  url = {https://pirsa.org/20040031},
  author = {Shaghoulian, Edgar},
  keywords = {Quantum Fields and Strings},
  language = {en},
  title = {Replica wormholes and the black hole information paradox },
  publisher = {Perimeter Institute},
  year = {2020},
  month = {apr},
  note = {PIRSA:20040031 see, \url{https://pirsa.org}}
}

Abstract

The information paradox can be realized in two-dimensional models of gravity. In this setting, we show that the large discrepancy between the von Neumann entropy as calculated by Hawking and the requirement of unitarity is fixed by including new saddles in the gravitational path integral. These saddles arise in the replica method as wormholes connecting different copies of the black hole. We will discuss their appearance both in asymptotically AdS and asymptotically flat theories of gravity.

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