Cosmological models with matter creation in open thermodynamic systems.

Details Cosmological models with matter creation in open thermodynamic systems. Cosmological models with matter creation in open thermodynamic systems.

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ijtp...38.1981j&link_type=abstract

International Journal of Theoretical Physics, Vol. 38, No. 7, p. 1981 - 1991

Mathematics

Logic

1

Cosmological Models: Particle Creation, Cosmological Models: Inflationary Universe

Scientific paper

Regarding the universe as an open thermodynamic system, the creation of matter/radiation particles out of gravitational energy is investigated. A new class of FRW models with creation of matter is obtained and their properties are examined. A suitable choice of the particle number density function n(t) = (A/tα)3/2 leads to inflationary solutions during the particle creation phase; subsequently the universe enters the Friedmann era. It is found that for a physically acceptable solution α > 1. A comparative study is made for α = 4/3, 2, 8/3, and 10/3 in order to find a viable model of the universe.

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