Running of scalar spectral index in multi-field inflation

被引：4

作者：

Gong, Jinn-Ouk ^{[1
,2
]}

机构：

[1] Asia Pacific Ctr Theoret Phys, Pohang 790784, South Korea

[2] Postech, Dept Phys, Pohang 790784, South Korea

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 05期

基金：

新加坡国家研究基金会;

关键词：

inflation; physics of the early universe; cosmological perturbation theory; MULTICOMPONENT INFLATON; 2ND-ORDER; FLATNESS; UNIVERSE; HORIZON;

D O I：

10.1088/1475-7516/2015/05/041

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the running of the scalar spectral index in general multi-field slow-roll inflation. By incorporating explicit momentum dependence at the moment of horizon crossing, we can find the running straightforwardly. At the same time, we can distinguish the contributions from the quasi de Sitter background and the super-horizon evolution of the field fluctuations.

引用

页数：8

共 35 条

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