A New Approach to Quintessence and a Solution of Multiple Attractors

Abstract

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.

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

References in corpus (4)

• Dynamics of dark energy
• Cosmology and the Fate of Dilatation Symmetry
• Cosmological Evolution of a Quintom Model of Dark Energy
• Challenges for scaling cosmologies

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• Extended Phase Space Analysis of Interacting Dark Energy Models in Loop Quantum Cosmology
• Full Investigation on the Dynamics of Power-Law Kinetic Quintessence
• Phase-space analysis of dark energy models in non-minimally coupled theories of gravity
• Dynamics of two-scalar-field cosmological models beyond the exponential potential
• Cosmological evolutions of $F(R)$ nonlinear massive gravity
• Geodesics and Bending of Light around a BTZ Black Hole Surrounded by Quintessential Matter