Magnetic fields from inflation: the transition to the radiation era
Cosmology and Nongalactic Astrophysics
2012-11-01 v3 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We compute the contribution to the scalar metric perturbations from large-scale magnetic fields which are generated during inflation. We show that apart from the usual passive and compensated modes, the magnetic fields also contribute to the constant mode from inflation. This is different from the causal (post inflationary) generation of magnetic fields where such a mode is absent and it might lead to significant, non-Gaussian CMB anisotropies.
Cite
@article{arxiv.1112.3901,
title = {Magnetic fields from inflation: the transition to the radiation era},
author = {Camille Bonvin and Chiara Caprini and Ruth Durrer},
journal= {arXiv preprint arXiv:1112.3901},
year = {2012}
}
Comments
19 pages, no figures. v2: Substantially revised version with different conclusions. v3: one reference added, matches version accepted for publication in PRD