Inflation and time asymmetry in the Universe

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The recently proposed inflationary Universe scenario1-4 explains several of the mysteries of modern cosmology. I argue here that it also provides a natural explanation for the origin of time asymmetry ('time's arrow') in the Universe. The new feature which inflation injects into this long-standing problem is the temporary dominance of the cosmological term in the gravitational field equations, which acts as a sort of repulsive gravity. This term generates huge quantities of energy and radiation (or matter) entropy, while drastically reducing the entropy density of the gravitational field. It thus establishes a large gap between the radiation entropy and the gravitational entropy, which gravity is now trying to close.

Original languageEnglish (US)
Pages (from-to)398-400
Number of pages3
JournalNature
Volume301
Issue number5899
DOIs
StatePublished - 1983
Externally publishedYes

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universe
asymmetry
entropy
gravitational fields
gravitation
radiation
cosmology
energy

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Cite this

Inflation and time asymmetry in the Universe. / Davies, Paul.

In: Nature, Vol. 301, No. 5899, 1983, p. 398-400.

Research output: Contribution to journalArticle

Davies, Paul. / Inflation and time asymmetry in the Universe. In: Nature. 1983 ; Vol. 301, No. 5899. pp. 398-400.
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