Variations of Infinite Derivative Modified Gravity

Abstract

We consider nonlocal modified Einstein gravity without matter, where nonlocal term has the form $P(R)F(\square )Q(R)$. For this model, in this paper we give the derivation of the equations of motion in detail. This is not an easy task and presented derivation should be useful to a researcher who wants to investigate nonlocal gravity. Also, we present the second variation of the related Einstein-Hilbert modified action and basics of gravity perturbations.

22 pages

References in corpus (4)

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