Dynamical Origin of the Entropy of a Black Hole

Details Dynamical Origin of the Entropy of a Black Hole Dynamical Origin of the Entropy of a Black Hole

1993-09-02

arxiv.org/abs/gr-qc/9309001v1

Phys.Rev.D48:4545-4551,1993

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, LaTeX, report NORDITA 93/45A (July 1993) (revision of the paper (submitted earlier to Phys.Rev.D) in response to ref

Scientific paper

10.1103/PhysRevD.48.4545

Modes of physical fields which are located inside a horizon and which cannot be observed by a distant observer are identified with dynamical degrees of freedom of a black hole. A new invariant statistical mechanical definition of a black-hole's entropy is proposed. It is shown that the main contribution to the entropy is given by thermally excited `invisible' modes propagating in the close vicinity of the horizon. A calculation based on the proposed definition yields a value of the entropy which is in good agreement with the usually adopted value.

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