Loops in reheating and cosmological perturbations
High Energy Physics - Theory
2014-08-13 v4 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We show that in scalar field inflationary models, the loop corrections in reheating corresponding to the decay of the inflaton can cause nontrivial superhorizon evolution of the curvature perturbation. The effect turns out to be prominent when the decay occurs via parametric resonance, even indicating the breakdown of the perturbation theory, as we demonstrate in a specific model.
Cite
@article{arxiv.1306.3236,
title = {Loops in reheating and cosmological perturbations},
author = {Ali Kaya},
journal= {arXiv preprint arXiv:1306.3236},
year = {2014}
}
Comments
v4: 24 pages, 1 figure, revtex4-1, minor typos corrected, a reference added, finally to appear in Phys. Rev. D