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Statefinder diagnostic for coupled quintessence
Zhang X(张鑫); Zhang, X
2005
发表期刊PHYSICS LETTERS B
卷号611期号:1-2页码:1-7
通讯作者Zhang, X (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918 4, Beijing 100039, Peoples R China.
文章类型Article
摘要The problem of the cosmic coincidence is a longstanding puzzle. This conundrum may be solved by introducing a coupling between the two dark sectors. In this Letter, we study two cases of the coupled quintessence scenario. (a) Assume that the mass of dark matter particles depends exponentially on the scalar field associated to dark energy and meanwhile the scalar field evolves in an exponential potential; (b) Assume that the mass of dark matter particles depends on a power law function of the scalar field and meanwhile the scalar field evolves in a power law potential. Since the dynamics of this system is dominated by an attractor solution, the mass of dark matter particles is forced to change with time as to ensure that the ratio between the energy densities of dark matter and dark energy becomes a constant at late times, and one thus solve the cosmic coincidence problem naturally. We perform a statefinder diagnostic to both cases of this coupled quintessence scenario. It is shown that the evolving trajectory of this scenario in the s-r diagram is quite different from those of other dark energy models. (c) 2005 Elsevier B.V. All rights reserved.
学科领域Physics
DOI10.1016/j.physletb.2005.02.022
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000228110300001
引用统计
被引频次:129[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225430
专题理论物理室
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Zhang X,Zhang, X. Statefinder diagnostic for coupled quintessence[J]. PHYSICS LETTERS B,2005,611(1-2):1-7.
APA 张鑫,&Zhang, X.(2005).Statefinder diagnostic for coupled quintessence.PHYSICS LETTERS B,611(1-2),1-7.
MLA 张鑫,et al."Statefinder diagnostic for coupled quintessence".PHYSICS LETTERS B 611.1-2(2005):1-7.
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