Multi-natural inflation

被引：72

作者：

Czerny, Michael ^{[1
]}

Takahashi, Fuminobu ^{[1
,2
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] Univ Tokyo, TODIAS, Univ WPI, Kavli Inst Phys & Math, Kashiwa 2778583, Japan

来源：

PHYSICS LETTERS B | 2014年 / 733卷

关键词：

CHAOTIC INFLATION; FLATNESS; UNIVERSE; HORIZON;

D O I：

10.1016/j.physletb.2014.04.039

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose a multi-natural inflation model in which the single-field inflaton potential consists of two or more sinusoidal potentials that are comparable in size but have different periodicity with a possible non-zero relative phase. The model is versatile enough to realize both large-field and small-field inflation. We show that, in a model with two sinusoidal potentials, the predicted values of the spectral index and tensor-to-scalar ratio lie within the 1 sigma region of the Planck data. In particular, there is no lower bound on the decay constants in contrast to the original natural inflation. We also show that, in a certain limit, multi-natural inflation can be approximated by a hilltop quartic inflation model. (C) 2014 The Authors. Published by Elsevier B.V.

引用

页码：241 / 246

页数：6

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