Tracker fields from nonminimally coupled theory
High Energy Physics - Theory
2009-09-25 v1
Abstract
We extend the concept of quintessence to a flat nonminimally coupled scalar - tensor theories of gravity. By means of Noether's symmetries for the cosmological pointlike Lagrangian L, it is possible to exhibit exact solutions for a class of models depending on a free parameter s. This parameter comes out in the relationship existing between the coupling F(\phi) and the potential V(\phi) because of such a symmetry for L. When inverse power law potentials are taken in account, a whole family of exact solutions parametrized by such an s is proposed as a class of tracker fields, and some considerations are made about them.
Cite
@article{arxiv.hep-th/9907198,
title = {Tracker fields from nonminimally coupled theory},
author = {R. de Ritis and A. A. Marino and C. Rubano and P. Scudellaro},
journal= {arXiv preprint arXiv:hep-th/9907198},
year = {2009}
}
Comments
17 pages, submitted to Physical Review D