A thermodynamic motivation for dark energy
General Relativity and Quantum Cosmology
2015-05-20 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
It is argued that the discovery of cosmic acceleration could have been anticipated on thermodynamic grounds, namely, the generalized second law and the approach to equilibrium at large scale factor. Therefore, the existence of dark energy -or equivalently, some modified gravity theory- should have been expected. In general, cosmological models that satisfy the above criteria show compatibility with observational data.
Cite
@article{arxiv.1012.0474,
title = {A thermodynamic motivation for dark energy},
author = {Ninfa Radicella and Diego Pavón},
journal= {arXiv preprint arXiv:1012.0474},
year = {2015}
}
Comments
22 pages, 7 eps figures; Key words: dark energy, thermodynamics, modified gravity. Comments added and arguments sharpened