Parametric resonance in quantum field theory

Details Parametric resonance in quantum field theory Parametric resonance in quantum field theory

2002-08-07

arxiv.org/abs/hep-ph/0208070v2

Phys.Rev.Lett.91:111601,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 figures, version to appear in Phys. Rev. Lett., results unchanged

Scientific paper

10.1103/PhysRevLett.91.111601

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 2PI 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.

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