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arXiv 1502.04167astro-ph.COgr-qchep-phhep-th
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吸引子单场暴胀中的一个新参数

A new parameter in attractor single-field inflation

Jinn-Ouk Gong, Misao Sasaki

摘要:

我们在一般单场暴胀的背景下重新审视慢卷的概念。作为慢滚动力学的推广,我们考虑了一个处于吸引子阶段的膨胀子$ϕ$,其中$ϕ$的时间导数由$ϕ$的函数$\dotϕ=\dotϕ(ϕ)$确定。换句话说,我们考虑的情况下,$e$倍$N$的数量从通货膨胀结束时向后计数的时间是唯一的$ϕ$,$N=N(ϕ)$的函数。在这种情况下,我们发现,我们需要一个新的独立的参数,以适当地描述一般的暴胀子场的动力学,除了通常表示为$ε$,$η$,$c_s^2$和$s$的标准参数。给出了两个说明性的例子来讨论暴胀子场的非慢滚动力学与观测一致。

英文摘要:

We revisit the notion of slow-roll in the context of general single-field inflation. As a generalization of slow-roll dynamics, we consider an inflaton $ϕ$ in an attractor phase where the time derivative of $ϕ$ is determined by a function of $ϕ$, $\dotϕ=\dotϕ(ϕ)$. In other words, we consider the case when the number of $e$-folds $N$ counted backward in time from the end of inflation is solely a function of $ϕ$, $N=N(ϕ)$. In this case, it is found that we need a new independent parameter to properly describe the dynamics of the inflaton field in general, in addition to the standard parameters conventionally denoted by $ε$, $η$, $c_s^2$ and $s$. Two illustrative examples are presented to discuss the non-slow-roll dynamics of the inflaton field consistent with observations.

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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