Quintessential perturbations during scaling regime

Details Quintessential perturbations during scaling regime Quintessential perturbations during scaling regime

2001-08-11

arxiv.org/abs/astro-ph/0108197v1

Phys.Rev.D64:103509,2001

Astronomy and Astrophysics

Astrophysics

5 pages, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.64.103509

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.

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