Inflation and nonequilibrium thermodynamics for the fluctuations in the infrared sector

Details Inflation and nonequilibrium thermodynamics for the fluctuations in the infrared sector Inflation and nonequilibrium thermodynamics for the fluctuations in the infrared sector

2000-11-06

arxiv.org/abs/gr-qc/0011020v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.63.087301

In the framework of inflationary cosmology I study some aspects of nonequilibrium thermodynamics for the matter field fluctuations. The thermodynamic analysis is developed for de Sitter and power - law expansions of the universe. In both cases, I find that the heat capacity is negative leading respectively, to exponential and superexponential growth for the number of states in the infrared sector for de Sitter and power-law expansions of the universe. The spectrum for the matter field fluctuations can be understood from the background effective temperature when the horizon entry.

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