How Far Can the Generalized Second Law Be Generalized?

Davies, P. C. W. and Davis, Tamara M. (2002) How Far Can the Generalized Second Law Be Generalized?. Foundations of Physics, 32 12: 1877-1889. doi:10.1023/A:1022318700787

Author Davies, P. C. W.
Davis, Tamara M.
Title How Far Can the Generalized Second Law Be Generalized?
Journal name Foundations of Physics   Check publisher's open access policy
ISSN 0015-9018
Publication date 2002-12-01
Year available 2002
Sub-type Article (original research)
DOI 10.1023/A:1022318700787
Open Access Status Not yet assessed
Volume 32
Issue 12
Start page 1877
End page 1889
Total pages 13
Place of publication New York
Publisher Plenum Press
Language eng
Subject 020103 Cosmology and Extragalactic Astronomy
Abstract Jacob Bekenstein's identification of black hole event horizon area with entropy proved to be a landmark in theoretical physics. In this paper we trace the subsequent development of the resulting generalized second law of thermodynamics (GSL), especially its extension to incorporate cosmological event horizons. In spite of the fact that cosmological horizons do not generally have well-defined thermal properties, we find that the GSL is satisfied for a wide range of models. We explore in particular the case of an asymptotically de Sitter universe filled with a gas of small black holes as a means of casting light on the relative entropic worth of black hole versus cosmological horizon area. We present some numerical solutions of the generalized total entropy as a function of time for certain cosmological models, in all cases confirming the validity of the GSL.
Keyword entropy
de Sitter space
cosmological constant
black holes
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 23 times in Scopus Article | Citations
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Created: Fri, 13 Feb 2009, 00:10:35 EST by Joanne Mellor on behalf of Physics