Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-03-17
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.
Brandenberger Robert
Finelli Fabio
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