A Two-Field Quintessence Model
Astrophysics
2010-05-28 v2
Abstract
We study the dynamics of a quintessence model based on two interacting scalar fields. The model can account for the (recent) accelerated expansion of the Universe suggested by astronomical observations. Acceleration can be permanent or temporary and, for both scenarios, it is possible to obtain suitable values for the cosmological parameters while satisfying the nucleosynthesis constraint on the quintessence energy density. We argue that the model dynamics can be made consistent with a stable zero-energy relaxing supersymmetric vacuum.
Keywords
Cite
@article{arxiv.astro-ph/0106405,
title = {A Two-Field Quintessence Model},
author = {M. C. Bento and O. Bertolami and N. C. Santos},
journal= {arXiv preprint arXiv:astro-ph/0106405},
year = {2010}
}
Comments
4 pages, 3 eps figures, to be published in Phys. Rev. D