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arXiv 1402.6798astro-ph.CO
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关于动力学项与引力非极小耦合的标量场的注记

Notes on a scalar field with a kinetic term non-minimally coupled to gravity

Amir Ghalee

摘要:

本文研究了具有与引力非极小耦合的动力学项的标量场的暴胀相。我们发现慢滚条件之一是标量场运动方程的自然结果。因此,慢滚条件对势能的约束比其他暴胀模型要少。此外,它表明,暴胀阶段可以描述只有一个慢滚参数。通过对度规扰动的研究,发现除了一个势外,几乎所有的势在($n_{s}$,$r$)平面上都具有相同的模式.我们提供了一个特殊情况下的精确解。精确解表示凝聚的标量场,并导致加速膨胀。

英文摘要:

We explore the inflationary phase of a scalar field with a kinetic term non-minimally coupled to gravity. We find that one of the slow-roll conditions is naturally consequence of the equation of motion of the scalar field. Thus, slow-roll conditions impose fewer constraints on potentials than other inflationary models. Moreover, it is demonstrated that the inflationary phase can be described by just one slow-roll parameter. By investigating the metric perturbations, it is shown that except for one potential, almost all potentials have the same pattern in the ($n_{s}$, $r$) plane. We provide an exact solution for the exceptional case. The exact solution represents the condensed scalar field and results in an accelerated expansion.

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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