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arXiv 1012.1372astro-ph.COhep-th
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Inflaton衰变的可观测特征

Observable Signatures of Inflaton Decays

Diana Battefeld, Thorsten Battefeld, John T. Giblin, Evan K. Pease

摘要:

我们数值计算的功率谱中的功能,起源于膨胀过程中的衰减领域。使用一个简单的,现象学的,多领域的设置,我们增加了领域的数量从几个到数千个。当一个场衰减时,它的相关势能转化为辐射,导致状态参数方程的跳跃和微扰水平的模式混合。我们观察到离散步骤的功率谱,如果字段的数量是低的,在协议与文献中的分析参数。一旦许多场在给定的哈勃时间内衰减,这些特征就会变得越来越模糊。在这个政权中,我们确认的有效性的分析方法交错膨胀,这是基于一个粗粒化的过程。我们的数值方法桥接了上述分析处理,并可用于更复杂的情况。

英文摘要:

We numerically compute features in the power-spectrum that originate from the decay of fields during inflation. Using a simple, phenomenological, multi-field setup, we increase the number of fields from a few to thousands. Whenever a field decays, its associated potential energy is transferred into radiation, causing a jump in the equation of state parameter and mode mixing at the perturbed level. We observe discrete steps in the power-spectrum if the number of fields is low, in agreement with analytic arguments in the literature. These features become increasingly smeared out once many fields decay within a given Hubble time. In this regime we confirm the validity of the analytic approach to staggered inflation, which is based on a coarse-graining procedure. Our numerical approach bridges the aforementioned analytic treatments, and can be used in more complicated scenarios.

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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