Thermodynamics of nonsingular bouncing universes

The European Physical Journal C

Diego Pavón¹  Pedro C. Ferreira² 

[1] Departamento de Física, Universidad Autónoma de Barcelona, 08193, Bellaterra, Barcelona, Spain;Escola de Ciências e Tecnologia, Universidade Federal do Rio Grande do Norte, 59072-970, Natal, Rio Grande do Norte, Brazil;

关键词: Entropy;    Black Hole;    Apparent Horizon;    Contracting Phase;    Null Energy Condition;   

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

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY