Dynamics of coupled phantom and tachyon fields

被引：40

作者：

Shahalam, M. ^{[1
]}

Pathak, S. D. ^{[2
]}

Li, Shiyuan ^{[2
]}

Myrzakulov, R. ^{[3
]}

Wang, Anzhong ^{[1
,4
]}

机构：

[1] Zhejiang Univ Technol, Inst Adv Phys & Math, Hangzhou, Zhejiang, Peoples R China

[2] Shandong Univ, Sch Phys, Jinan, Shandong, Peoples R China

[3] Eurasian Natl Univ, Dept Gen & Theoret Phys, Eurasian Int Ctr Theoret Phys, Astana, Kazakhstan

[4] Baylor Univ, Dept Phys, GCAP CASPER, Waco, TX 76798 USA

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 10期

关键词：

PROBE WMAP OBSERVATIONS; COLD DARK-MATTER; COSMOLOGICAL CONSTANT; ACCELERATING UNIVERSE; ENERGY; CONSEQUENCES; QUINTESSENCE; EVOLUTION; EQUATION; LAMBDA;

D O I：

10.1140/epjc/s10052-017-5255-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this paper, weapply the dynamical analysis to a coupled phantom field with scaling potential taking particular forms of the coupling (linear and combination of linear), and present phase space analysis. We investigate if there exists a late time accelerated scaling attractor that has the ratio of dark energy and dark matter densities of the order one. We observe that the scrutinized couplings cannot alleviate the coincidence problem, however, they acquire stable late time accelerated solutions. We also discuss a coupled tachyon field with inverse square potential assuming linear coupling.

引用

页数：12

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