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arXiv 1702.04720gr-qc
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耦合幻影场和快子场的动力学

Dynamics of coupled phantom and tachyon fields

M. Shahalam, S. D. Pathak, Shiyuan Li, R. Myrzakulov, Anzhong Wang

摘要:

本文将动力学分析应用于具有标度势的耦合幻影场,给出了耦合幻影场的相空间分析。研究了是否存在暗能量与暗物质密度之比为1的晚时加速标度吸引子。我们观察到,仔细的耦合不能缓解的重合问题,但获得稳定的后期时间加速解决方案。在线性耦合的情况下,我们还讨论了具有平方反比势的耦合快子场。

英文摘要:

In this paper, we apply 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 exist 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 acquire stable late time accelerated solutions. We also discuss coupled tachyon field with inverse square potential assuming linear coupling.

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