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arXiv 0708.3768gr-qc
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从唯象$Λ$模型看暴胀宇宙学

Scenario of inflationary cosmology from the phenomenological $Λ$ models

Saibal Ray, P. C. Ray, Partha Pratim Ghosh, Utpal Mukhopadhyay, Partha Chowdhury

摘要:

选择动力学宇宙学项$Λ$的三种唯象模型,$Λ\sim (\dot a/a)^2$,$Λ\sim {\ddot a/a}$和$Λ\sim ρ$(其中$a$是宇宙尺度因子),用数值分析的方法证明了这三种模型对扁平宇宙$k=0$是等价的。给出了$k=0, +1$的动力学宇宙学项$Λ$与时间$t$的演化曲线,以及宇宙尺度因子$a$与时间$t$的演化曲线。从支持暴胀和宇宙膨胀的观点的图中进行了定性分析。

英文摘要:

Choosing the three phenomenological models of the dynamical cosmological term $Λ$, viz., $Λ\sim (\dot a/a)^2$, $Λ\sim {\ddot a/a}$ and $Λ\sim ρ$ where $a$ is the cosmic scale factor, it has been shown by the method of numerical analysis that the three models are equivalent for the flat Universe $k=0$. The evolution plots for dynamical cosmological term $Λ$ vs. time $t$ and also the cosmic scale factor $a$ vs. $t$ are drawn here for $k=0, +1$. A qualitative analysis has been made from the plots which supports the idea of inflation and hence expanding Universe.

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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