Reconstructing the distortion function for nonlocal cosmology

被引：108

作者：

Deffayet, C. ^{[1
]}

Woodard, R. P. ^{[2
]}

机构：

[1] Univ Paris 07, CNRS, CEA, UMR 7164,APC, F-75205 Paris 13, France

[2] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2009年 / 08期

关键词：

modified gravity; dark energy theory; EQUATION-OF-STATE; DARK ENERGY; BACK-REACTION; GRAVITY; SUPERNOVAE; LAMBDA; BRANE;

D O I：

10.1088/1475-7516/2009/08/023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 Lambda CDM cosmology, and the result agrees well with a simple hyperbolic tangent.

引用

页数：14

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