A Two-Field Quintessence Model

Details A Two-Field Quintessence Model A Two-Field Quintessence Model

2001-06-22

arxiv.org/abs/astro-ph/0106405v2

Phys.Rev.D65:067301,2002

Astronomy and Astrophysics

Astrophysics

4 pages, 3 eps figures, to be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.65.067301

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.

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