Phys. Rev. D 48, 4545–4551 (1993)Dynamical origin of the entropy of a black holeReceived 12 July 1993; published in the issue dated 15 November 1993 Modes of physical fields which are located inside a horizon and which cannot be observed by a distant observer are identified with the dynamical degrees of freedom of a black hole. A new invariant statistical mechanical definition of black-hole 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 AH/(4lPl2), where AH is the black-hole surface area and lPl is the Planck length. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.48.4545
DOI:
10.1103/PhysRevD.48.4545
PACS:
97.60.Lf, 04.20.Cv, 05.30.-d
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