Gas models for inflation and quintessence

Details Gas models for inflation and quintessence Gas models for inflation and quintessence

2002-10-09

arxiv.org/abs/astro-ph/0210204v1

Grav.Cosmol. 8 (2002) 158-163

Astronomy and Astrophysics

Astrophysics

13 pages, Talk at the V International Conference on Gravitation and Astrophysics of Asian-Pacific Countries, Moscow, Oct.1 - O

Scientific paper

Specific internal self-interactions in gaseous cosmic fluids are shown to give rise to effective negative pressures which may violate the strong energy condition. On this basis we discuss the transition from an initial de Sitter phase to a subsequent Friedmann-Lema\^{\i}tre-Robertson-Walker period as a non-equilibrium configuration of an ultrarelativistic gas. An accelerated expansion of the present universe is obtained as the consequence of a negative internal friction force which is self-consistently exerted on the non-relativistic cold dark matter (CDM) type microscopic constituents of the cosmic gas.

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