Mixed inflaton and curvaton perturbations
Mixed inflaton and curvaton perturbations
复制标题
混合暴胀子和曲率扰动
DOI：
10.1103/physrevd.70.063522
复制
发表时间：
2004
影响因子：
5
通讯作者：
F. Vernizzi
中科院分区：
文献类型：
--
作者：
D. Langlois;F. Vernizzi
膨胀范式的一个最新变体是，原始曲率微扰来自标量场的量子涨落，标量场在膨胀过程中处于次优地位，实际上是无质量的，称为曲率子场，而不是膨胀子场的涨落。我们考虑由膨胀子场的量子涨落和曲率子场的量子涨落产生的原始曲率微扰具有相同量级的情况。我们计算了这种情况下的全曲率扰动及其谱，并讨论了观测结果。
A recent variant of the inflationary paradigm is that the primordial curvature perturbations come from quantum fluctuations of a scalar field, subdominant and effectively massless during inflation, called the 'curvaton', instead of the fluctuations of the inflaton field. We consider the situation where the primordial curvature perturbations generated by the quantum fluctuations of an inflaton and of a curvaton field are of the same order of magnitude. We compute the total curvature perturbation and its spectrum in this case and we discuss the observational consequences.