Curvaton paradigm can accommodate multiple low inflation scales
Curvaton paradigm can accommodate multiple low inflation scales
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Curvaton范式可以适应多个低通胀尺度
DOI：
10.1088/0264-9381/21/4/l02
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发表时间：
2004
影响因子：
3.5
通讯作者：
Tomohiro Matsuda
中科院分区：
文献类型：
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作者：
Tomohiro Matsuda
最近的论证表明，某些曲率场可能产生宇宙学曲率摄动。由于曲率独立于暴胀场，因此有希望通过曲率情景来解决暴胀模型的微调问题。然而，最近Lyth讨论到，在暴胀期间，哈勃参数存在一个强边界，即使假设存在曲率。尽管规避了最严重的约束，但对于许多低通胀规模的模型来说，这一界限似乎相当关键。在本文中，我们试图消除这种约束。我们表明，如果存在多个阶段的暴胀，则边界会被大幅修改。
Recent arguments show that some curvaton field may generate the cosmological curvature perturbation. As the curvaton is independent of the inflaton field, there is a hope that the fine tunings of inflation models can be cured by the curvaton scenario. More recently, however, Lyth discussed that there is a strong bound for the Hubble parameter during inflation even if one assumes the curvaton scenario. Although the most serious constraint was evaded, the bound seems rather crucial for many models of a low inflation scale. In this paper we try to remove the constraint. We show that the bound is drastically modified if there were multiple stages of inflation.