Consequences of a possible violation of the Strong Equivalence Principle. I. Statistical Physics, Thermodynamics and the Background Radiation

Details Consequences of a possible violation of the Strong Equivalence Principle. I. Statistical Physics, Thermodynamics and the Background Radiation Consequences of a possible violation of the Strong Equivalence Principle. I. Statistical Physics, Thermodynamics and the Background Radiation

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996grco....2..143s&link_type=abstract

Gravitation & Cosmology, v. 2, pp. 143-147

Physics

1

Cosmology, Gravitation, Early Universe, Cosmic Background Radiation

Scientific paper

We analyze the consequences of a possible (scale-covariant) violation of the Strong Equivalence Principle on the basic expressions of statistical physics and thermodynamics. To this end, we use the kinetic theory generalized to a Weyl geometry, developed by Dominguez-Tenreiro and Serna (1990). We find that, although the entropy per particle is constant, the universe expansion is not adiabatic in this framework. However, it is possible to define a quantity with dimensions of entropy that is, instead, conserevd during the universe expansion. We also show that the obtained generalized equations are compatible with some observational results as, for example, the cosmic background radiation

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