Entropy of the isolated horizon from the surface term of gravitational action
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Publication:2930665
DOI10.1088/0264-9381/31/19/195002zbMATH Open1304.83019arXiv1403.7352OpenAlexW3101803218MaRDI QIDQ2930665
Author name not available (Why is that?)
Publication date: 19 November 2014
Published in: (Search for Journal in Brave)
Abstract: Starting from the surface term of gravitational action, one can construct a Virasoro algebra with central extension, with which the horizon entropy can be derived by using Cardy formula. This approach gives a new routine to calculate and interpret the horizon entropy. In this paper, we generalize this approach to a more general case, the isolated horizon, which contains non-stationary spacetimes beyond stationary ones. By imposing appropriate boundary conditions near the horizon, the full set of diffeomorphism is restricted to a subset where the corresponding Noether charges form a Virasoro algebra with central extension. Then by using the Cardy formula, we can derive the entropy of the isolated horizon.
Full work available at URL: https://arxiv.org/abs/1403.7352
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