Tracker fields from nonminimally coupled theory

Details Tracker fields from nonminimally coupled theory Tracker fields from nonminimally coupled theory

1999-07-27

arxiv.org/abs/hep-th/9907198v1

Phys.Rev.D62:043506,2000

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, submitted to Physical Review D

Scientific paper

10.1103/PhysRevD.62.043506

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.

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