Does the second law hold at cosmic scales?
Cosmology and Nongalactic Astrophysics
2019-02-19 v1 General Relativity and Quantum Cosmology
Abstract
The second law of thermodynamics is known to hold at small scales also when gravity plays a leading role, as in the case of black holes and self-gravitating radiation spheres. It has been suggested that it should as well at large scales. Here, by a purely kinematic analysis \textemdash based on the history of the Hubble factor and independent of any cosmological model \textemdash , we explore if this law is fulfilled in the case of homogeneous and isotropic universes regardless of the sign of the spatial curvature.
Cite
@article{arxiv.1902.06651,
title = {Does the second law hold at cosmic scales?},
author = {Manuel Gonzalez-Espinoza and Diego Pavón},
journal= {arXiv preprint arXiv:1902.06651},
year = {2019}
}