EFFECTS OF BULK VISCOSITY ON COSMOLOGICAL EVOLUTION

Authors
PIMENTEL LO DIAZRIVERA LM
Citation
Lo. Pimentel et Lm. Diazrivera, EFFECTS OF BULK VISCOSITY ON COSMOLOGICAL EVOLUTION, Nuovo cimento della Societa italiana di fisica. B, Relativity, classical and statistical physics, 109(12), 1994, pp. 1317-1321
Citations number
2
Categorie Soggetti
Physics
Journal title
Nuovo cimento della Societa italiana di fisica. B, Relativity, classical and statistical physics → ACNP
ISSN journal
11241888
Volume
109
Issue
12
Year of publication
1994
Pages
1317 - 1321
Database
ISI
SICI code
1124-1888(1994)109:12<1317:EOBVOC>2.0.ZU;2-7
Abstract
The effect of bulk viscosity on the evolution of the homogeneous and i sotropic cosmological models is considered. Solutions are found, with a barotropic equation of state, and a viscosity coefficient that is pr oportional to a power of the energy density of the universe. For flat space, power law expansions, related to extended inflation are found a s well as exponential solutions, related to old inflation; also a solu tion with expansion that is an exponential of an exponential of the ti me is found.