Structure growth inf(R) theories of gravity with a dust equation of state
Kishore N Ananda, Sante Carloni, Peter K S Dunsby
2009
Classical and quantum gravity
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
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... urth 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.
doi:10.1088/0264-9381/26/23/235018
fatcat:z5fxbifc4zdk7fwiu4fkdzk7hq