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arXiv 1303.6402gr-qc
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具有指数势的标量宇宙学中的一个新变量

A new variable in scalar cosmology with exponential potential

Hyeong-Chan Kim

摘要:

本文提出了一种新的方法来描述空间平坦的Friedmann-Robertson-Walker时空中具有指数势$V\propto e^{\sqrt{6}βϕ/M_{Pl}}$的Einstein标量场理论的解。我们引入了一个新的时间变量$L$,它可能在$[-1,1]$中变化。新的时间清楚地代表了宇宙的状态,因为给定时间的状态方程采用了简单的形式,$w= -1+ 2L^2$。当$|L|<1/\sqrt{3}$。对$β\leq 1$来说,宇宙的演化在$L=β$结束。这意味着宇宙尽头的状态方程只不过是$w=-1+2β^2$。对于$β\geq 1$,宇宙在L=1处结束,其中宇宙的状态方程是1。另一方面,宇宙总是以$L=\pm 1$的$w=1$开始。

英文摘要:

We present a new way describing the solution of the Einstein-scalar field theory with exponential potential $V\propto e^{\sqrt{6}βϕ/M_{Pl}}$ in spatially flat Friedmann-Robertson-Walker space-time. We introduced a new time variable, $L$, which may vary in $[-1,1]$. The new time represents the state of the universe clearly because the equation of state at a given time takes the simple form, $w= -1+ 2L^2$. The universe will inflate when $|L|<1/\sqrt{3}$. For $β\leq 1$, the universe ends with its evolution at $L=β$. This implies that the equation of state at the end of the universe is nothing but $w=-1+2β^2$. For $β\geq 1$, the universe ends at L=1, where the equation of state of the universe is one. On the other hand, the universe always begins with $w=1$ at $L=\pm 1$.

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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