A New Approach to Quintessence and a Solution of Multiple Attractors

Details A New Approach to Quintessence and a Solution of Multiple Attractors A New Approach to Quintessence and a Solution of Multiple Attractors

2007-05-11

arxiv.org/abs/0705.1577v3

Phys.Lett.B660:7-12,2008

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, Revtex4; To appear in PLB

Scientific paper

10.1016/j.physletb.2007.12.020

We take a new approach to construct Quintessential models. With this approach, we first easily obtain a tracker solution that is different from those discovered before and straightforwardly find a solution of multiple attractors, i.e., a solution with more than one attractor for a given set of parameters. Then we propose a scenario of Quintessence where the field jumps out of the scaling attractor to the de-Sitter-like attractor, by introducing a field whose value changes a certain amount in a short time, leading to the current acceleration. We also calculate the change the field needs for a successful jump and suggest a possible mechanism that involves spontaneous symmetry breaking to realize the sudden change of the field value.

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