On Modified Gravity

Details On Modified Gravity On Modified Gravity

2012-02-10

arxiv.org/abs/1202.2352v2

Physics

High Energy Physics

High Energy Physics - Theory

added references; made some clarifications; 8 pages

Scientific paper

We consider some aspects of nonlocal modified gravity, where nonlocality is of the type $R \mathcal{F}(\Box) R$. In particular, using ansatz of the form $\Box R = c R^\gamma,$ we find a few $R(t)$ solutions for the spatially flat FLRW metric. There are singular and nonsingular bounce solutions. For late cosmic time, scalar curvature R(t) is in low regime and scale factor a(t) is decelerated. R (t) = 0 satisfies all equations when k = -1.

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