Breakdown of the semiclassical approximation during the early stages of preheating

被引：6

作者：

Anderson, Paul R. ^{[1
]}

Molina-Paris, Carmen ^{[2
]}

Sanders, Dillon H. ^{[1
,3
]}

机构：

[1] Wake Forest Univ, Dept Phys, Winston Salem, NC 27109 USA

[2] Univ Leeds, Dept Appl Math, Leeds LS2 9JT, W Yorkshire, England

[3] N Carolina State Univ, Dept Nucl Engn, Raleigh, NC 27695 USA

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 08期

基金：

美国国家科学基金会;

关键词：

INFLATION; LATTICE; FIELDS;

D O I：

10.1103/PhysRevD.92.083522

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The validity of the semiclassical approximation is investigated during the preheating phase in models of chaotic inflation using a modification of a criterion previously proposed for semiclassical gravity. If the modified criterion is violated then fluctuations of the two-point function for the quantum fields are large and the semiclassical approximation is not valid. Evidence is provided that the semiclassical approximation breaks down during the early stages of preheating, well before either scattering effects or backreaction effects are important.

引用

页数：6

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