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Thermodynamics of Nonsingular Bouncing Universes

Diego Pavůn
Universidad Autůnoma de Barcelona

Abstract
Homogeneous and isotropic, nonsingular, bouncing world models are designed to evade the initial singularity at the beginning of the cosmic expansion. We study the thermodynamics of the subset of these models governed by general relativity. Considering the entropy of matter and radiation and taking into account that the entropy of the apparent horizon varies as its area, we argue that these models do not respect the generalized second law of thermodynamics, also away from the bounce.

2016 July 04, 10:30

IA/U.Lisboa
Faculdade de CiÍncias da Universidade de Lisboa (C8.2.04)
Campo Grande, 1749-016 Lisboa

Instituto de Astrof√≠sica e Ci√™ncias do Espa√ßo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa Funda√ß√£o para a Ci√™ncia e a Tecnologia
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