Dynamical analysis of Brans-Dicke universe with inverse power-law effective potential

被引：1

作者：

Sim, Jonghyun ^{[1
]}

Park, Jiwon ^{[1
]}

Lee, Tae Hoon ^{[1
,2
]}

机构：

[1] Soongsil Univ, Dept Phys, Seoul 06978, South Korea

[2] Soongsil Univ, Res Inst Origin Matter & Evolut Galaxies, Seoul 06978, South Korea

来源：

MODERN PHYSICS LETTERS A | 2020年 / 35卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

Modified gravity; dark energy; dynamical analysis; COSMOLOGICAL CONSTANT; HIGGS-BOSON; FIELD; MODEL;

D O I：

10.1142/S0217732320500947

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study Brans-Dicke cosmology with an inverse power-law effective potential. By using dynamical analyses, we search for fixed points corresponding to the radiation-like matter and dark energy-dominated era of our Universe, and the stability of fixed points is also investigated. We find phase space trajectories which are attracted to the stable point of the dark energy-dominated era from unstable fixed points like matter-dominated era of the Universe. The dark energy comes from effective potentials of the Brans-Dicke field, whose variation (related to the time-variation of the gravitational coupling constant) is shown to be in good agreement with observational data.

引用

页数：21

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