Tracking k-essence -: art. no. 063514

被引：229

作者：

Chiba, T ^{[1
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

PHYSICAL REVIEW D | 2002年 / 66卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.66.063514

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We derive a condition for converging a common evolutionary track for k-essence (a scalar field dark energy with noncanonical kinetic terms). For the Lagrangian density V(phi)W(X) with X=phi(2)/2, we find that tracker solutions with w(phi)<w(B) exist if Gammaequivalent toV"V/(V')(2)>3/2. Here w(phi) (w(B)) is the equation of state of the scalar field (background radiation or matter). Our condition may be useful for examining the existence of attractorlike behavior in cosmology with k-essence (for example, a rolling tachyon).

引用

页数：4

共 18 条

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