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arXiv 0811.0782gr-qc
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时间变量$Λ$和加速宇宙

Time variable $Λ$ and the accelerating Universe

U. Mukhopadhyay, Saibal Ray, A. A. Usmani, Partha Pratim Ghosh

摘要:

我们进行了一个演绎研究的加速宇宙,并专注于在爱因斯坦的场方程的唯象假设下,$Λ=αH^2$的$α$的整个物理范围的可变的时间相关的$Λ$的重要性。变量$Λ$与各种关键问题,如暗物质,暗能量,场的几何形状,宇宙的年龄,减速参数和正压状态方程的相关性已被平凡地处理。对于由Friedmann和Raychaudhuri方程描述的平坦宇宙,减速参数和正压状态方程参数服从直线关系。发现$α= 1$的两个参数相同。

英文摘要:

We perform a deductive study of accelerating Universe and focus on the importance of variable time-dependent $Λ$ in the Einstein's field equations under the phenomenological assumption, $Λ=αH^2$ for the full physical range of $α$. The relevance of variable $Λ$ with regard to various key issues like dark matter, dark energy, geometry of the field, age of the Universe, deceleration parameter and barotropic equation of state has been trivially addressed. The deceleration parameter and the barotropic equation of state parameter obey a straight line relationship for a flat Universe described by Friedmann and Raychaudhuri equations. Both the parameters are found identical for $α= 1$.

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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