A characteristic signature of fourth order gravity

Details A characteristic signature of fourth order gravity A characteristic signature of fourth order gravity

2008-12-10

arxiv.org/abs/0812.2028v1

Astronomy and Astrophysics

Astrophysics

4 pages and 3 figures

Scientific paper

We present for the first time the complete matter power spectrum for $R^n$ gravity which has been derived from the fourth order scalar perturbation equations. This leads 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 studies in this area and therefore provides a crucial test for fourth order gravity on cosmological scales.

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