On the late-time cosmology of a condensed scalar field

被引：0
|
作者：
Ghalee, Amir [1 ]
机构：
[1] Tafresh Univ, Dept Phys, Tafresh, Iran
来源：
MODERN PHYSICS LETTERS A | 2016年 / 31卷 / 12期
关键词：
Dark energy; modified gravity; non-minimal coupling;
D O I：
10.1142/S0217732316500784
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the late-time cosmology of a scalar field with a kinetic term non-minimally coupled to gravity. It is demonstrated that the scalar field dominate the radiation matter and the cold dark matter (CDM). Moreover, we show that eventually the scalar field will be condensed and results in an accelerated expansion. The metric perturbations around the condensed phase of the scalar field are investigated and it has been shown that the ghost instability and gradient instability do not exist.
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页数：15
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