Cosmological dynamics of the tachyon with an inverse power-law potential

被引：0
|
作者：
Abramo, LRW [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2004年 / 43卷 / 03期
关键词：
cosmology; inflation; dark energy;
D O I：
10.1023/B:IJTP.0000048164.48387.d6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate tachyon dynamics with an inverse power-law potential V(phi) proportional to phi(-alpha). We find global attractors of the dynamics leading to a dust behavior for alpha > 2 and to an accellerating universe for 0 < alpha <= 2. We study linear cosmological perturbations and we show that metric fluctuations are constant on large scales in both cases. In the presence of an additional perfect fluid, the tachyon with this potential behaves as dust or dark energy.
引用
收藏
页码：563 / 573
页数：11
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