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Reconstructing the Distortion Function for Nonlocal Cosmology

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arxiv 0904.0961 v2 pith:3S6LWYLE submitted 2009-04-06 gr-qc astro-ph.COhep-th

C. Deffayet (APC) , R. P. Woodard (U. Florida) This is my paper · ORCID
classification gr-qcastro-ph.COhep-th
keywords cosmologyfunctiondistortiontechniqueactingagreesalembertianapplied
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We consider the cosmology of modified gravity models in which Newton's constant is distorted by a function of the inverse d'Alembertian acting on the Ricci scalar. We derive a technique for choosing the distortion function so as to fit an arbitrary expansion history. This technique is applied numerically to the case of LambdaCDM cosmology, and the result agrees well with a simple hyperbolic tangent.

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Cited by 1 Pith paper

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  1. Quasinormal modes of nonlocal gravity black holes

    gr-qc 2025-07 conditional novelty 6.0 of 10

    Quasinormal frequencies of nonlocal gravity black holes deviate from Schwarzschild values by up to about 12%, and the derived bounds on the model parameters α and k depend on projected detector sensitivity.

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