Cosmological magnetic fields by parametric resonance?
Astrophysics
2016-11-03 v1 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We investigate the possibility that electromagnetic fluctuations are amplified in expanding universe by parametric resonance, during the oscillatory regime of a scalar field to which they are coupled. We consider scalar electrodynamics and we find that electromagnetic fluctuations undergo exponential instabilities. This mechanism could have some relevance for the problem of large scale primordial magnetic fields.
Cite
@article{arxiv.astro-ph/0007290,
title = {Cosmological magnetic fields by parametric resonance?},
author = {F. Finelli},
journal= {arXiv preprint arXiv:astro-ph/0007290},
year = {2016}
}
Comments
4 pages, no figures. Talk given at COSMO 99: 3rd International Conference on Particle Physics and the Early Universe, Trieste, Italy, 27 Sep - 3 Oct 1999