Cosmological dissipative structure

P. C.W. Davies

doi:10.1007/BF00670348

Cosmological dissipative structure

P. C.W. Davies

Research output: Contribution to journal › Article › peer-review

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Abstract

The concept of black hole entropy is generalized to cosmological event horizons. An analogue of the Bekenstein-Hawking generalized second law of thermodynamics is suggested. This law is illustrated by considering entropy changes in various black hole de Sitter spacetimes, and also with the help of a viscous-driven de Sitter universe model, which provides a cosmological version of a far-fromequilibrium dissipative structure. The law apparently fails for some recontractinguniverse models. This indicates that a contribution to the gravitational entropy has been omitted. A possible remedy involving algorithmic complexity theory is suggested. I propose the use of a cosmic "entropy censorship" hypothesis as a filter for acceptable field theories.

Original language	English (US)
Pages (from-to)	1051-1066
Number of pages	16
Journal	International Journal of Theoretical Physics
Volume	28
Issue number	9
DOIs	https://doi.org/10.1007/BF00670348
State	Published - Sep 1 1989
Externally published	Yes

ASJC Scopus subject areas

General Mathematics
Physics and Astronomy (miscellaneous)

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10.1007/BF00670348

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AB - The concept of black hole entropy is generalized to cosmological event horizons. An analogue of the Bekenstein-Hawking generalized second law of thermodynamics is suggested. This law is illustrated by considering entropy changes in various black hole de Sitter spacetimes, and also with the help of a viscous-driven de Sitter universe model, which provides a cosmological version of a far-fromequilibrium dissipative structure. The law apparently fails for some recontractinguniverse models. This indicates that a contribution to the gravitational entropy has been omitted. A possible remedy involving algorithmic complexity theory is suggested. I propose the use of a cosmic "entropy censorship" hypothesis as a filter for acceptable field theories.

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Cosmological dissipative structure

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