A detailed analysis of structure growth in f(R) theories of gravity release_krfajdlxzvevxcoctnile5zhkm

by Kishore N. Ananda, Sante Carloni, Peter K. S. Dunsby

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2008  

Abstract

We investigate the connection between dark energy and fourth order gravity by analyzing the behavior of scalar perturbations around a Friedmann-Robertson-Walker background. The evolution equations for scalar perturbation are derived using the covariant and gauge invariant approach and applied to two widely studied f(R) gravity models. The structure of the general fourth order perturbation equations and the analysis of scalar perturbations lead to the discovery of a characteristic signature of fourth order gravity in the matter power spectrum, the details of which have not seen before in other works in this area. This could provide a crucial test for fourth order gravity on cosmological scales.
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Date   2008-09-22
Version   v1
Language   en ?
arXiv  0809.3673v1
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