Thermodynamics of de Sitter universes

Details Thermodynamics of de Sitter universes Thermodynamics of de Sitter universes

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvd..65h3501h&link_type=abstract

Physical Review D, vol. 65, Issue 8, id. 083501

Mathematics

Logic

5

Quantum Aspects Of Black Holes, Evaporation, Thermodynamics

Scientific paper

It is shown that the first law of thermodynamics can be applied to the de Sitter universe to relate its vacuum energy, pressure, entropy of horizon, chemical potential, etc., when the cosmological constant changes due to the fluctuation of the vacuum or other reasons. The second law should be reformulated in the form that the spontaneous decay of the vacuum never makes the entropy of the de Sitter universe decrease. The third law of thermodynamics, applying to the de Sitter universe, implies that the cosmological constant cannot reach zero by finite physical processes. The relation to the holographic principle is also briefly discussed.

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