Parametric resonance in quantum field theory

被引：158

作者：

Berges, J ^{[1
]}

Serreau, J ^{[1
]}

机构：

[1] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.91.111601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first study of parametric resonance in quantum field theory from a complete next-to-leading order calculation in a 1/N expansion of the two-particle irreducible effective action, which includes scattering and memory effects. We present a complete numerical solution for an O(N)-symmetric scalar theory and provide an approximate analytic description of the nonlinear dynamics in the entire amplification range. We find that the classical resonant amplification at early times is followed by a collective amplification regime with explosive particle production in a broad momentum range, which is not accessible in a leading-order calculation.

引用

页数：4

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