Late time evolution of a nonminimally coupled scalar field system

被引：7
作者：
Shahalam, M. [1 ,2 ]
Myrzakulov, R. [3 ]
Khlopov, Maxim Yu [4 ,5 ,6 ]
机构：
[1] Zhejiang Univ Technol, Inst Theoret Phys & Cosmol, Hangzhou 310023, Zhejiang, Peoples R China
[2] Jamia Millia Islamia, Ctr Theoret Phys, New Delhi 110025, India
[3] Eurasian Natl Univ, Eurasian Int Ctr Theoret Phys, Dept Gen & Theoret Phys, Astana, Kazakhstan
[4] Natl Res Nucl Univ MEPHI, Moscow Engn Phys Inst, Moscow 115409, Russia
[5] APC Lab, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France
[6] Southern Fed Univ, Inst Phys, Rostov Na Donu, Russia
来源：
GENERAL RELATIVITY AND GRAVITATION | 2019年 / 51卷 / 09期
关键词：
Dark energy; Modified theories of gravity; Phase space analysis; Nonminimal coupling; DARK; LAMBDA;
D O I：
10.1007/s10714-019-2610-6
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We revisit the dynamics of a nonminimally coupled scalar field model in case of F(phi) R coupling with F(phi) = 1 - xi phi(2), the potentials V(phi) = V-0(1 + phi(p))(2) and V(phi) = V(0)e(lambda phi 2). We use an autonomous system to bring out new asymptotic regimes, and find stable de-Sitter solution. Under the chosen functional form of F(phi) and steep exponential potentials, a true de-Sitter solution is trivially satisfied for which the equation of state w(phi) similar or equal to -1, the effective gravitational constant G(eff) and field phi are constant that has been missed in the power law case and our previous study.
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页数：13
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