Evaporation/Antievaporation and energy conditions in alternative gravity
General Relativity and Quantum Cosmology
2018-02-28 v1
Abstract
We discuss the evaporation and antievaporation instabilities of Nariai solution in extended theories of gravity. These phenomena were explicitly shown in several different extensions of General Relativity, suggesting that a universal cause is behind them. We show that evaporation and antievaporation are originated from deformations of energy conditions on the Nariai horizon. Energy conditions get new contributions from the extra propagating degrees of freedom, which can provide extra focalizing or antifocalizing terms in the Raychanduri equation. We also show two explicit examples in -gravity and Gauss-Bonnet gravity.
Keywords
Cite
@article{arxiv.1707.05724,
title = {Evaporation/Antievaporation and energy conditions in alternative gravity},
author = {Andrea Addazi},
journal= {arXiv preprint arXiv:1707.05724},
year = {2018}
}