Preheating with Fractional Powers
High Energy Physics - Theory
2016-12-06 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We consider preheating in models in which the potential for the inflaton is given by a fractional power, as is the case in axion monodromy inflation. We assume a standard coupling between the inflaton field and a scalar matter field. We find that in spite of the fact that the oscillation of the inflaton about the field value which minimizes the potential is anharmonic, there is nevertheless a parametric resonance instability, and we determine the Floquet exponent which describes this instability as a function of the parameters of the inflaton potential.
Cite
@article{arxiv.1502.06135,
title = {Preheating with Fractional Powers},
author = {Hossein Bazrafshan Moghaddam and Robert Brandenberger},
journal= {arXiv preprint arXiv:1502.06135},
year = {2016}
}
Comments
12 pages, 1 figure; matches published version (MPLA-D-16-00263; new title compared to original version, extended analysis