Noether symmetry for Gauss-Bonnet dilatonic gravity
Cosmology and Nongalactic Astrophysics
2015-05-28 v1
Abstract
Noether symmetry for Gauss-Bonnet-Dilatonic interaction exists for a constant dilatonic scalar potential and a linear functional dependence of the coupling parameter on the scalar field. The symmetry with the same form of the potential and coupling parameter exists all in the vacuum, radiation and matter dominated era. The late time acceleration is driven by the effective cos- mological constant rather than the Gauss-Bonnet term, while the later compensates for the large value of the effective cosmological constant giving a plausible answer to the well-known coincidence problem.
Cite
@article{arxiv.1107.0560,
title = {Noether symmetry for Gauss-Bonnet dilatonic gravity},
author = {Abhik Kumar Sanyal and Claudio Rubano and Ester Piedipalumbo},
journal= {arXiv preprint arXiv:1107.0560},
year = {2015}
}
Comments
17 pages, 5 figures, in press on GRG