Non-minimal gravitational coupling of phantom and big rip singularity

被引：14
作者：
Bisabr, Yousef [1 ]
机构：
[1] Shahid Rajaee Teacher Training Univ, Dept Phys, Tehran 16788, Iran
来源：
GENERAL RELATIVITY AND GRAVITATION | 2013年 / 45卷 / 08期
关键词：
Modified gravity; Cosmology; Dark energy; DARK ENERGY; MODIFIED GRAVITY; SUPERNOVAE; UNIVERSE;
D O I：
10.1007/s10714-013-1544-7
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We consider a non-minimal coupling of a perfect fluid matter system with geometry, which the coupling function is taken to be an arbitrary function of the Ricci scalar. Due to such a coupling, the matter stress tensor is no longer conserved and there is an energy transfer between the two components. By solving the conservation equation and applying the second law of thermodynamics, we show that direction of the energy transfer depends on the equation of state of the matter fluid. In particular, a phantom fluid should loose energy with expansion of the universe. This energy reduction can avoid the universe to end with a cosmic doomsday.
引用
收藏
页码：1559 / 1566
页数：8
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