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Reconstructing the Distortion Function for Nonlocal Cosmology

C. Deffayet 1 R.P. Woodard
1 APC - THEORIE
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : 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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http://hal.in2p3.fr/in2p3-00379092
Contributor : Simone Lantz <>
Submitted on : Monday, April 27, 2009 - 4:00:22 PM
Last modification on : Sunday, January 3, 2021 - 11:26:03 AM

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C. Deffayet, R.P. Woodard. Reconstructing the Distortion Function for Nonlocal Cosmology. Journal of Cosmology and Astroparticle Physics, Institute of Physics (IOP), 2009, 08, pp.023. ⟨10.1088/1475-7516/2009/08/023⟩. ⟨in2p3-00379092⟩

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