On Metric Preheating

Details On Metric Preheating On Metric Preheating

1999-06-08

arxiv.org/abs/hep-ph/9906287v2

Phys.Rev. D61 (2000) 023519

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 latex pages, 1 postscript figure included, uses revtex.sty in two column format and epsf.sty, some typos corrected and refer

Scientific paper

10.1103/PhysRevD.61.023519

We consider the generation of super-horizon metric fluctuations during an epoch of preheating in the presence of a scalar field \chi quadratically coupled to the inflaton. We find that the requirement of efficient broad resonance is concomitant with a severe damping of super-horizon \delta\chi quantum fluctuations during inflation. Employing perturbation theory with backreaction included as spatial averages to second order in the scalar fields and in the metric, we argue that the usual inflationary prediction for metric perturbations on scales relevant for structure formation is not strongly modified.

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