Quintom dark energy with nonminimal coupling

被引：16

作者：

Marciu, Mihai ^{[1
]}

机构：

[1] Univ Bucharest, Fac Phys, 405 Atomistilor,POB MG-11, RO-077125 Bucharest, Romania

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 12期

关键词：

MOMENTUM TENSOR; WORLD-STRUCTURE; SCALAR FIELD; KINEMATICS; CURVATURE; MODELS; EQUATION; PHANTOM; SPACE;

D O I：

10.1103/PhysRevD.93.123006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The quintom formalism is studied by considering the nonminimal coupling of the quintessence and the phantom field, respectively, with the scalar curvature of space-time. The dynamical aspects of the evolution of the system are evaluated by considering numerical solutions of the system of equations from the matter-dominated era. It is observed that the cosmic expansion is accelerated, the Universe is evolving toward the big rip, while the coupling coefficient. is affecting mainly the dark energy equation of state. For significant values of the coupling coefficient, the dark energy equation of state presents an oscillatory behavior around the phantom divide line and the frequency of the oscillations is increasing with the strength of the coupling. At late times the Universe is dark-energy dominated, and dark energy evolves asymptotically to the cosmological constant.

引用

页数：7

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