The stability of modified gravity models
General Relativity and Quantum Cosmology
2008-11-26 v1 Astrophysics
High Energy Physics - Theory
Abstract
Conditions for the existence and stability of de Sitter space in modified gravity are derived by considering inhomogeneous perturbations in a gauge-invariant formalism. The stability condition coincides with the corresponding condition for stability with respect to homogeneous perturbations, while this is not the case in scalar-tensor gravity. The stability criterion is applied to various modified gravity models of the early and the present universe.
Cite
@article{arxiv.gr-qc/0511094,
title = {The stability of modified gravity models},
author = {Valerio Faraoni and Shahn Nadeau},
journal= {arXiv preprint arXiv:gr-qc/0511094},
year = {2008}
}
Comments
22 pages, LaTeX, to appear in Phys. Rev. D