Matter instability in modified gravity
Astrophysics
2008-11-26 v2 General Relativity and Quantum Cosmology
Abstract
The Dolgov-Kawasaki instability discovered in the matter sector of the modified gravity scenario incorporating a 1/R correction to Einstein gravity is studied in general f(R) theories. A stability condition is found in the metric version of these theories to help ruling out models that are unviable from the theoretical point of view.
Keywords
Cite
@article{arxiv.astro-ph/0610734,
title = {Matter instability in modified gravity},
author = {Valerio Faraoni},
journal= {arXiv preprint arXiv:astro-ph/0610734},
year = {2008}
}
Comments
4 pages, revtex, to appear in Phys. Rev. D. In the revised version, an error concerning the Palatini version of these theories has been corrected and the references updated