Cosmological Perturbation Analysis in a Scale Invariant Model of Gravity
General Relativity and Quantum Cosmology
2012-02-06 v2
Abstract
We consider a model for gravity that is invariant under global scale transformations. It includes one extra real scalar field coupled non-minimally to the gravity fields. In this model all the dimensionful parameters like the gravitational constant and the cosmological constant etc. are generated by a solution of the classical equations of motion which breaks scale invariance. In this paper we demonstrate the stability of such a solution against small perturbations in a flat FRW background by making a perturbative expansion around this solution and solving the resulting equations linear in the perturbations.
Keywords
Cite
@article{arxiv.1105.4929,
title = {Cosmological Perturbation Analysis in a Scale Invariant Model of Gravity},
author = {Pankaj Jain and Purnendu Karmakar and Subhadip Mitra and Sukanta Panda and Naveen K. Singh},
journal= {arXiv preprint arXiv:1105.4929},
year = {2012}
}
Comments
9 pages, 1 figure