Tracking-essence
- 30 September 2002
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 66 (6)
- https://doi.org/10.1103/physrevd.66.063514
Abstract
We derive a condition for converging a common evolutionary track for k-essence (a scalar field dark energy with non-canonical kinetic terms). For the Lagrangian density V(phi)W(X) with X=dot{phi}^2/2, we find tracker solutions with w_{phi} < w_B exist if Gamma equivalent V''V/(V')^2 > 3/2. Here w_{phi}(w_B) is the equation-of-state of the scalar field (background radiation/matter). Our condition may be useful for examining the existence of the attractor-like behavior in cosmology with k-essence.Comment: 7 pages, minor changes, to appear in Phys.Rev.Keywords
Other Versions
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