FRW Cosmological Perturbations in Massive Bigravity
High Energy Physics - Theory
2014-10-08 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
Cosmological perturbations of FRW solutions in ghost free massive bigravity, including also a second matter sector, are studied in detail. At early time, we find that sub horizon exponential instabilities are unavoidable and they lead to a premature departure from the perturbative regime of cosmological perturbations.
Keywords
Cite
@article{arxiv.1403.5679,
title = {FRW Cosmological Perturbations in Massive Bigravity},
author = {D. Comelli and M. Crisostomi and L. Pilo},
journal= {arXiv preprint arXiv:1403.5679},
year = {2014}
}
Comments
latex, 14 pages