Palatini Approach to Modified Gravity: f(R) Theories and Beyond
Abstract
We review the recent literature on modified theories of gravity in the Palatini approach. After discussing the motivations that lead to consider alternatives to Einstein's theory and to treat the metric and the connection as independent objects, we review several topics that have been recently studied within this framework. In particular, we provide an in-depth analysis of the cosmic speedup problem, laboratory and solar systems tests, the structure of stellar objects, the Cauchy problem, and bouncing cosmologies. We also discuss the importance of going beyond the f(R) models to capture other phenomenological aspects related with dark matter/energy and quantum gravity.
Keywords
Cite
@article{arxiv.1101.3864,
title = {Palatini Approach to Modified Gravity: f(R) Theories and Beyond},
author = {Gonzalo J. Olmo},
journal= {arXiv preprint arXiv:1101.3864},
year = {2011}
}
Comments
50 pages, 6 figures, Invited Review to be submitted to International Journal of Modern Physics D; comments are welcome