Recovering the effective cosmological constant in extended gravity theories
General Relativity and Quantum Cosmology
2008-11-26 v1
Abstract
In the framework of extended gravity theories, we discuss the meaning of a time dependent "cosmological constant" and give a set of conditions to recover asymptotic de Sitter behaviour for a class of cosmological models independently of initial data. To this purpose we introduce a time-dependent (effective) quantity which asymptotically becomes the true cosmological constant. We will deal with scalar-tensor, fourth and higher than fourth-order theories.
Keywords
Cite
@article{arxiv.gr-qc/9804053,
title = {Recovering the effective cosmological constant in extended gravity theories},
author = {S. Capozziello and R. de Ritis and A. A. Marino},
journal= {arXiv preprint arXiv:gr-qc/9804053},
year = {2008}
}
Comments
24 pages, Latex, submitted to Gen.Rel.and Grav