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arXiv 2201.00658hep-th
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复精粹理论中鬼暗能量的相互作用

Interacting Ghost Dark Energy in Complex Quintessence Theory

Yang Liu

摘要:

本文利用相互作用暗能量的鬼模型,在复精粹理论中得到了FRW宇宙中鬼能量密度的状态方程。我们重建的潜力和研究的标量场,描述复杂的精髓宇宙学的动力学。我们对非相互作用和相互作用两种情况进行了ω-ω'分析和稳定性分析,得到了与真实模型相同的基本结论,其中ω' = dω/dlna.考虑到复分量的影响,并假设经典场的实部是一个“慢滚”场,我们得出结论:非相互作用模型不能描述真实宇宙,因为这将导致分数能量密度Ω D > 1,其中Ω D可以定义为ρ D与ρ {cr}的比值。而在相互作用的情况下,如果我们取当前的Ω_D = 0.73,则可以确定b^2 = 0.0849,其中b^2是物质与暗能量之间的相互作用耦合参数。在实精粹模型中,Ω_D和b^2是相互独立的参数,而在复精粹模型中,我们得出这两个参数之间存在关系的结论。

英文摘要:

We employ a ghost model of interacting dark energy to obtain the equation of state ωfor ghost energy density in an FRW universe in complex quintessence theory. We reconstruct the potential and study the dynamics of the scalar field that describes complex quintessence cosmology. We perform ω-ω' analysis and stability analysis for both non-interacting and interacting cases and find that the same basic conclusion as for the real model, where ω' = dω/dlna. Taking account of the effect of the complex part and assuming the real part of the quintessence field to be a "slow-rolling" field, we conclude that the non-interacting model cannot describe the real universe since this will lead to fractional energy density Ω_D > 1, where Ω_D can be defined as the ratio of ρ_D to ρ_{cr}. However, for the interacting case, if we take present Ω_D = 0.73, then we can determine that b^2 = 0.0849, where b^2 is the interaction coupling parameter between matter and dark energy. In the real quintessence model, Ω_D and b^2 are independent parameters, whereas in the complex quintessence model, we conclude that there is a relationship between these two parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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