Entropy of Microwave Background Radiation in Observable Universe

Details Entropy of Microwave Background Radiation in Observable Universe Entropy of Microwave Background Radiation in Observable Universe

2006-06-05

arxiv.org/abs/gr-qc/0606024v2

Phys.Rev.D74:047301,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages, no figures, revised version to publish in PRD brief report

Scientific paper

10.1103/PhysRevD.74.047301

We show that the cosmological constant at late time places a bound on the entropy of microwave background radiation deposited in the future event horizon of a given observer, $S\leq S_{\Lambda_0}^{3/4}$. This bound is independent of the energy scale of reheating and the FRW evolution after reheating. We also discuss why the entropy of microwave background in our observable universe has its present value.

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