A note on viability of nonminimally coupled $f(R)$ theory
General Relativity and Quantum Cosmology
2017-03-13 v2
Abstract
Consistency conditions for nonminimally coupled theories have been derived by requiring the absence of tachyons and instabilities in the scalar fluctuations. This note confirms these results and clarifies a subtlety regarding different definitions of sound speeds.
Keywords
Cite
@article{arxiv.1606.04060,
title = {A note on viability of nonminimally coupled $f(R)$ theory},
author = {Tomi Koivisto and Nicola Tamanini},
journal= {arXiv preprint arXiv:1606.04060},
year = {2017}
}
Comments
4 pages. -added acknowledgement