Quintessential perturbations during scaling regime

Abstract

The scalar field with an exponential potential allows a scaling solution where the the density of the field follows the density of the dominating fluid. Such a scaling regime is often used as an important ingredient in many models of quintessence. We analyse evolution of perturbations while the background follows the scaling. As the results, the perturbed scalar field also scales with the perturbed fluid, and the perturbations accompany the adiabatic as well as the isocurvature mode between the fluid and the field.

5 pages, to appear in Phys. Rev. D

References in corpus (5)

• Cosmology and the Fate of Dilatation Symmetry
• Attractors and Isocurvature Perturbations in Quintessence Models
• Towards a model of Quintessential Inflation
• Cosmic Microwave Background Anisotropy with Cosine-Type Quintessence
• Gauge Invariant Perturbation Analysis for Quintessence with an Exponential Potential

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