https://doi.org/10.1140/epjc/s10052-016-3886-2
Regular Article - Theoretical Physics
Thermodynamics of nonsingular bouncing universes
1
Escola de Ciências e Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, 59072-970, Brazil
2
Departamento de Física, Universidad Autónoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
* e-mail: diego.pavon@uab.es
Received:
22
September
2015
Accepted:
5
January
2016
Published online:
22
January
2016
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.
© The Author(s), 2016
