Tracking quintessence and k-essence in a general cosmological background
General Relativity and Quantum Cosmology
2008-11-26 v1 Astrophysics
High Energy Physics - Theory
Abstract
We derive conditions for stable tracker solutions for both quintessence and k-essence in a general cosmological background, H^2 \propto f(\rho). We find that tracker solutions are possible only when \eta = d ln f /d ln \rho is constant, aside from a few special cases, which are enumerated. Expressions for the quintessence or k-essence equation of state are derived as a function of \eta and the equation of state of the dominant background component.
Keywords
Cite
@article{arxiv.gr-qc/0609014,
title = {Tracking quintessence and k-essence in a general cosmological background},
author = {Rupam Das and Thomas W. Kephart and Robert J. Scherrer},
journal= {arXiv preprint arXiv:gr-qc/0609014},
year = {2008}
}
Comments
6 pages, no figures