Quintessential perturbations during scaling regime - art. no. 103509

Authors
Citation
Jc. Hwang et H. Noh, Quintessential perturbations during scaling regime - art. no. 103509, PHYS REV D, 6410(10), 2001, pp. 3509
Citations number
48
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6410
Issue
10
Year of publication
2001
Database
ISI
SICI code
0556-2821(20011115)6410:10<3509:QPDSR->2.0.ZU;2-4
Abstract
A scalar field with an exponential potential allows a scaling solution wher e the density of the field follows the density of the dominating fluid. Suc h a scaling regime is often used as an important ingredient in many models of quintessence. We analyze the evolution of perturbations while the backgr ound follows the scaling. As a result, the perturbed scalar field also scal es with the perturbed fluid, and the perturbations accompany the adiabatic mode as well as the isocurvature mode between the fluid and the field.