2006/09/05 by Rupam Das, Thomas W. Kephart, Robert J. Scherrer · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.74.103515
published as Phys.Rev.D74:103515,2006 · 6 pages, no figures
arxiv created 2006/09/05 · openalex publication_date 2006/11/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We derive conditions for stable tracker solutions for both quintessence and k-essence in a general cosmological background, H2\ensuremath∝f(\ensuremathρ). We find that tracker solutions are possible only when \ensuremathη\ensuremath≡dlnf/dln\ensuremathρ\ensuremath≈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 \ensuremathη and the equation of state of the dominant background component.