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arXiv 1706.08145gr-qc
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完美流体宇宙学:一个状态方程和最一般的解

Perfect Fluid Cosmological Universes: One equation of state and the most general solution

Anadijiban Das, Asit Banerjee, Subenoy Chakraborty, Supriya Pan

摘要:

考虑一个以Friedmann-Lemattre-Robertson-Walker(FLRW)线元为特征的均匀各向同性宇宙,本文给出了宇宙物质状态方程满足一般结构$ϕ(p, ρ) = 0$时宇宙学解的一般形式,其中$p$,$ρ$分别为宇宙物质的压力和能量密度.使用一般的形式主义,我们恢复了一些众所周知的解决方案,即,当宇宙物质服从线性状态方程,Chaubergin型状态方程,或非线性状态方程。因此,目前的工作提供了一种新的技术来解决宇宙学解决方案之间没有任何先验关系的$p$和$ρ$。

英文摘要:

Considering a homogeneous and isotropic universe characterized by the Friedmann-Lemaître-Robertson-Walker (FLRW) line element, in this work, we have prescribed a general formalism for the cosmological solutions when the equation of state of the cosmic substance follows a general structure $ϕ(p, ρ) = 0$, where $p$, $ρ$ are respectively the pressure and the energy density of the cosmic substance. Using the general formalism we recover some well known solutions, namely, when the cosmic substance obeys the linear equation of state, a Chaplygin type equation of state, or a nonlinear equation of state. Thus, the current work offers a new technique to solve the cosmological solutions without any prior relation between $p$ and $ρ$.

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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