Parametric Amplification of Metric Fluctuations During Reheating in Two Field Models

Details Parametric Amplification of Metric Fluctuations During Reheating in Two Field Models Parametric Amplification of Metric Fluctuations During Reheating in Two Field Models

2000-03-17

arxiv.org/abs/hep-ph/0003172v1

Phys.Rev.D62:083502,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 10 figures

Scientific paper

10.1103/PhysRevD.62.083502

We study the parametric amplification of super-Hubble-scale scalar metric fluctuations at the end of inflation in some specific two-field models of inflation, a class of which is motivated by hybrid inflation. We demonstrate that there can indeed be a large growth of fluctuations due to parametric resonance and that this effect is not taken into account by the conventional theory of isocurvature perturbations. Scalar field interactions play a crucial role in this analysis. We discuss the conditions under which there can be nontrivial parametric resonance effects on large scales.

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