Cosmic implications on thermodynamics and the explanation of the so called horizon problem

Details Cosmic implications on thermodynamics and the explanation of the so called horizon problem Cosmic implications on thermodynamics and the explanation of the so called horizon problem

1999-11-26

arxiv.org/abs/gr-qc/9911105v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 1 figure

Scientific paper

We show that there are implications on thermodynamics that come from the existence of the initial cosmic singularity. At present time this is more a conceptual change than an observable one. However at very early cosmic times there is a big difference between the actual behavior of thermodynamic quantities and the behavior assumed in the standard cosmological model. We present the discussion of two systems: an ideal monatomic gas at present, and a photon gas at the early Universe. We show the striking result that the entropy density goes to zero as the cosmic time goes to zero. This in turn, provides an explanation for the so called horizon problem.

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