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Entropy 2011, 13(7), 1355-1379; doi:10.3390/e13071355
Article

Effective Conformal Descriptions of Black Hole Entropy

Department of Physics, University of California at Davis, Davis, CA 95616, USA
Received: 1 July 2011 / Revised: 12 July 2011 / Accepted: 19 July 2011 / Published: 20 July 2011
(This article belongs to the Special Issue Black Hole Thermodynamics)
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Abstract

It is no longer considered surprising that black holes have temperatures and entropies. What remains surprising, though, is the universality of these thermodynamic properties: their exceptionally simple and general form, and the fact that they can be derived from many very different descriptions of the underlying microscopic degrees of freedom. I review the proposal that this universality arises from an approximate conformal symmetry, which permits an effective “conformal dual” description that is largely independent of the microscopic details.
Keywords: black holes; Bekenstein–Hawking entropy; conformal dual black holes; Bekenstein–Hawking entropy; conformal dual
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Carlip, S. Effective Conformal Descriptions of Black Hole Entropy. Entropy 2011, 13, 1355-1379.

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