Nonperturbative infrared effects for light scalar fields in de Sitter space

被引：29

作者：

Arai, Takashi ^{[1
,2
]}

机构：

[1] KEK Theory Ctr, Tsukuba, Ibaraki 3050801, Japan

[2] Nagoya Univ, Grad Sch Math, Nagoya, Aichi 4648602, Japan

来源：

CLASSICAL AND QUANTUM GRAVITY | 2012年 / 29卷 / 21期

关键词：

O(N) MODEL; LARGE-N; RENORMALIZATION; APPROXIMATIONS; SYMMETRY; MASSLESS; STATES;

D O I：

10.1088/0264-9381/29/21/215014

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the phi(4) scalar field theory in de Sitter space using the two-particle irreducible effective action formalism. This formalism enables us to investigate some nonperturbative quantum aspects of the theory. We use the mean field and gap equations to calculate the physical mass and the effective potential. We find that nonperturbative infrared effects in de Sitter space produce a curvature-induced mass and work to restore the broken Z(2) symmetry.

引用

页数：10

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