A viability criterion for modified gravity with an extra force
General Relativity and Quantum Cosmology
2008-11-26 v1
Abstract
A recently proposed theory of modified gravity with an explicit ``anomalous'' coupling of the Ricci curvature to matter is discussed, and an inequality is derived which expresses a necessary and sufficient condition to avoid the notorius Dolgov-Kawasaki instability.
Keywords
Cite
@article{arxiv.0710.1291,
title = {A viability criterion for modified gravity with an extra force},
author = {Valerio Faraoni},
journal= {arXiv preprint arXiv:0710.1291},
year = {2008}
}
Comments
4 latex pages, to appear in Phys. Rev. D