Thermodynamics of nonsingular bouncing universes
| Autor: | Pedro C. Ferreira, Diego Pavón |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics and Astronomy (miscellaneous) General relativity Initial singularity media_common.quotation_subject Nonsingular bouncing universes FOS: Physical sciences Thermodynamics Second law of thermodynamics General Relativity and Quantum Cosmology (gr-qc) Bouncing universes 01 natural sciences General Relativity and Quantum Cosmology law.invention Metric expansion of space law 0103 physical sciences 010303 astronomy & astrophysics Engineering (miscellaneous) Entropy (arrow of time) media_common Physics 010308 nuclear & particles physics Isotropy Invertible matrix Apparent horizon Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN European Physical Journal C |
| ISSN: | 1434-6052 1434-6044 |
| DOI: | 10.1140/epjc/s10052-016-3886-2 |
| Popis: | 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, radiation and that the entropy of the apparent horizon is proportional to its area, we argue that these models do not respect the generalised second law of thermodynamics, also away from the bounce. 12 pages, 3 figures. Version published in the European Physical Journal C |
| Databáze: | OpenAIRE |
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