On dissipational processes in the cosmological GUT ERA

Details On dissipational processes in the cosmological GUT ERA On dissipational processes in the cosmological GUT ERA

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..93..127o&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 93, no. 1, June 1983, p. 127-134.

Astronomy and Astrophysics

Astrophysics

1

Cosmology, Energy Dissipation, Nonequilibrium Thermodynamics, Unified Field Theory, Universe, Anisotropy, Elementary Particle Interactions, Mathematical Models, Thermodynamic Equilibrium, Viscosity

Scientific paper

A discussion of equilibrium conditions in the cosmological GUT (Grand Unified Theories) era leads to the conclusion that viscous approximation is not adequate to describe kinetic dissipative processes acting at that epoch. The attempt of an alternative description is presented within the assumed simple model. The maximal possible gain of entropy is a slowly increasing function of the initial anisotropy parameter. The mechanism generating bulk viscosity in the gas of interacting massless particles is also presented. There is only a small dissipative effect connected with this phenomenon.

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