PIRSA:17070031

Video URL

https://pirsa.org/17070031

Black Hole Entropy from BMS Symmetry at the Horizon

Carlip, S. (2017). Black Hole Entropy from BMS Symmetry at the Horizon. Perimeter Institute for Theoretical Physics. https://pirsa.org/17070031

Carlip, Steve. Black Hole Entropy from BMS Symmetry at the Horizon. Perimeter Institute for Theoretical Physics, Jul. 17, 2017, https://pirsa.org/17070031 

          @misc{ scivideos_PIRSA:17070031,
            doi = {10.48660/17070031},
            url = {https://pirsa.org/17070031},
            author = {Carlip, Steve},
            keywords = {Other Physics},
            language = {en},
            title = {Black Hole Entropy from BMS Symmetry at the Horizon},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {jul},
            note = {PIRSA:17070031 see, \url{https://scivideos.org/index.php/pirsa/17070031}}
          }

Steve Carlip University of California, Davis

Talk numberPIRSA:17070031
DOI10.48660/17070031
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

One of the basic puzzles of black hole thermodynamics is the simplicity and universality of the  Bekenstein-Hawking entropy. The idea that this entropy might be governed by a symmetry at the horizon is an old one, but until now efforts have focused on conformal symmetries, either at infinity or on a "stretched horizon."  I argue that a better approach uses a BMS-like symmetry of the horizon itself.  This avoids the limitations of previous attempts (including my own), and explains the entropy in terms of a generalization of the Cardy formula for the density of states.