Inflation and time asymmetry in the universe

Details Inflation and time asymmetry in the universe Inflation and time asymmetry in the universe

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.301..398d&link_type=abstract

Nature, vol. 301, Feb. 3, 1983, p. 398-400.

Mathematics

Logic

24

Cosmology, Entropy, Gravitational Fields, Thermodynamic Equilibrium, Einstein Equations, Evolution (Development), Nuclear Fusion

Scientific paper

It is proposed that the inflationary universe scenario provides a natural explanation for the origin of time asymmetry (time's arrow) in the universe. The inflationary universe scenario injects a new feature into this problem by providing for the temporary dominance of the cosmological term in the gravitational field equations, which acts as a sort of repulsive gravity. Huge amounts of energy and radiation (or matter) entropy are generated by this term, while this term drastically reduces the entropy density of the gravitational field. A large gap is thus established between the radiation entropy and the gravitational entropy, which gravity is now trying to close.

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