Consistency relations in multi-field inflation

被引：7

作者：

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

Seo, Min-Seok ^{[3
]}

机构：

[1] Asia Pacific Ctr Theoret Phys, Pohang 37673, South Korea

[2] Postech, Dept Phys, Pohang 37673, South Korea

[3] Inst for Basic Sci Korea, Ctr Theoret Phys Universe, Daejeon 34051, South Korea

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 02期

基金：

新加坡国家研究基金会;

关键词：

cosmological perturbation theory; inflation; quantum field theory on curved space; OPERATOR PRODUCT EXPANSION; GAUGE; RENORMALIZATION; PERTURBATIONS; FLUCTUATIONS; DYNAMICS;

D O I：

10.1088/1475-7516/2018/02/008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the consequences of spatial coordinate transformation in multi-field inflation. Among the spontaneously broken de Sitter isometries, only dilatation in the comoving gauge preserves the form of the metric and thus results in quantum-protected Slavnov-Taylor identities. We derive the corresponding consistency relations between correlation functions of cosmological perturbations in two different ways, by the connected and one-particle-irreducible Green's functions. The lowest-order consistency relations are explicitly given, and we find that even in multi-field inflation the consistency relations in the soft limit are independent of the detail of the matter sector.

引用

页数：25

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