Statistical Thermodynamics of a Black Hole in Terms of Surface Fields

Details Statistical Thermodynamics of a Black Hole in Terms of Surface Fields Statistical Thermodynamics of a Black Hole in Terms of Surface Fields

1995-10-24

arxiv.org/abs/hep-th/9510180v1

Phys.Rev.D53:2870-2873,1996

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, no figures, LaTeX

Scientific paper

10.1103/PhysRevD.53.2870

An action principle for spacetimes with the topology of an Euclidean black-hole is given. The gravitational field is described by the ordinary volume degrees of freedom plus additional surface fields at the horizon. The surface degrees of freedom correspond to diffeomorphisms on the sphere at the horizon and a field of ``opening angles''. General covariance forces the surface modes to be confined to a box of an unusual exponential shape, whose volume must be specified as part of the definition of the statistical ensemble. This gives rise to the Bekenstein-Hawking entropy.

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