Are stealth scalar fields stable?
General Relativity and Quantum Cosmology
2014-11-21 v1 High Energy Physics - Theory
Abstract
Non-gravitating (stealth) scalar fields associated with Minkowski space in scalar-tensor gravity are examined. Analytical solutions for both non-minimally coupled scalar field theory and for Brans-Dicke gravity are studied and their stability with respect to tensor perturbations is assessed using a covariant and gauge-invariant formalism developed for alternative gravity. For Brans-Dicke solutions, the stability with respect to homogeneous perturbations is also studied. There are regions of parameter space corresponding to stability and other regions corresponding to instability.
Cite
@article{arxiv.1006.1936,
title = {Are stealth scalar fields stable?},
author = {Valerio Faraoni and Andres F. Zambrano Moreno},
journal= {arXiv preprint arXiv:1006.1936},
year = {2014}
}
Comments
10 pages, 1 table, no figures, to appear in Phys. Rev, D