A new approach to modified-gravity models
Cosmology and Nongalactic Astrophysics
2011-11-07 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We investigate f(R)-gravity models performing the ADM-slicing of standard General Relativity. We extract the static, spherically-symmetric vacuum solutions in the general case, which correspond to either Schwarzschild de-Sitter or Schwarzschild anti-de-Sitter ones. Additionally, we study the cosmological evolution of a homogeneous and isotropic universe, which is governed by an algebraic and not a differential equation. We show that the universe admits solutions corresponding to acceleration at late cosmological epochs, without the need of fine-tuning the model-parameters or the initial conditions.
Cite
@article{arxiv.0908.0293,
title = {A new approach to modified-gravity models},
author = {Sayan K. Chakrabarti and Emmanuel N. Saridakis and Anjan A. Sen},
journal= {arXiv preprint arXiv:0908.0293},
year = {2011}
}
Comments
8 pages, 3 figures, version published in Gen.Rel.Grav