Over the past decade, f(R) theories have been extensively studied as one of the simplest modifications to General Relativity. In this article we review various applications of f(R) theories to cosmology and gravity – such as inflation, dark energy, local gravity constraints, cosmological perturbations, and spherically symmetric solutions in weak and strong gravitational backgrounds. We present a number of ways to distinguish those theories from General Relativity observationally and experimentally. We also discuss the extension to other modified gravity theories such as Brans–Dicke theory and Gauss–Bonnet gravity, and address models that can satisfy both cosmological and local gravity constraints.
Keywords: modified gravity, dark energy, inflation, f(R) gravity, cosmological perturbations
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Since a Living Reviews in Relativity article may evolve over time, please cite the access <date>, which uniquely identifies the version of the article you are referring to:
Antonio De Felice and Shinji Tsujikawa,
"f(R) Theories",
Living Rev. Relativity 13, (2010), 3. URL (cited on <date>):
http://www.livingreviews.org/lrr-2010-3
ORIGINAL | http://www.livingreviews.org/lrr-2010-3 |
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Title | f(R) Theories |
Author | Antonio De Felice / Shinji Tsujikawa |
Date | accepted 17 May 2010, published 23 June 2010 |