Curvature scalar instability in f(R) gravity
General Relativity and Quantum Cosmology
2008-11-26 v2 Astrophysics
High Energy Physics - Theory
Abstract
An instability in the presence of matter in theories of gravity which include a 1/R correction in the gravitational action has been found by Dolgov and Kawasaki. In the present paper this instability is discussed for f(R) gravity in general. We focus on the Palatini formalism of the theory and it is shown that no such instability occurs in this version of f(R) gravity. The reasons for the appearance of the instability in the metric but not in the Palatini formalism are fully investigated.
Cite
@article{arxiv.gr-qc/0611107,
title = {Curvature scalar instability in f(R) gravity},
author = {Thomas P. Sotiriou},
journal= {arXiv preprint arXiv:gr-qc/0611107},
year = {2008}
}
Comments
typos corrected, replaced to match published version