Evolution of largescale perturbations in quintessence models
Abstract
We carry out a comprehensive study of the dynamics of largescale perturbations in quintessence scenarios. We model the contents of the Universe by a perfect fluid with equation of state w_{f} and a scalar field Q with potential V(Q). We are able to reduce the perturbation equations to a system of four firstorder equations. During each of the five main regimes of quintessence field behavior, these equations have constant coefficients, enabling an analytic solution of the perturbation evolution by eigenvector decomposition. We determine these solutions and discuss their main properties.
 Publication:

Physical Review D
 Pub Date:
 December 2002
 DOI:
 10.1103/PhysRevD.66.123506
 arXiv:
 arXiv:astroph/0208562
 Bibcode:
 2002PhRvD..66l3506M
 Keywords:

 98.80.Cq;
 Particletheory and fieldtheory models of the early Universe;
 Astrophysics
 EPrint:
 5 pages RevTeX4 file with two figures incorporated