Thermodynamics of nonsingular bouncing universes

Pedro C. Ferreira; Diego Pavón

doi:10.1140/epjc/s10052-016-3886-2

Thermodynamics of nonsingular bouncing universes

Pedro C. Ferreira, Diego Pavón

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

18 Citations (Scopus)

Abstract

© 2016, The Author(s). Homogeneous and isotropic, nonsingular, bouncing world models are designed to evade the initial singularity at the beginning of the cosmic expansion. Here, we study the thermodynamics of the subset of these models governed by general relativity. Considering the entropy of matter and radiation and considering the entropy of the apparent horizon to be proportional to its area, we argue that these models do not respect the generalized second law of thermodynamics, also away from the bounce.

Original language	English
Article number	37
Pages (from-to)	1-5
Journal	European Physical Journal C
Volume	76
Issue number	1
DOIs	https://doi.org/10.1140/epjc/s10052-016-3886-2
Publication status	Published - 1 Jan 2016

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AB - © 2016, The Author(s). Homogeneous and isotropic, nonsingular, bouncing world models are designed to evade the initial singularity at the beginning of the cosmic expansion. Here, we study the thermodynamics of the subset of these models governed by general relativity. Considering the entropy of matter and radiation and considering the entropy of the apparent horizon to be proportional to its area, we argue that these models do not respect the generalized second law of thermodynamics, also away from the bounce.

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Thermodynamics of nonsingular bouncing universes

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