Model-independent constraints in inflationary magnetogenesis
Cosmology and Nongalactic Astrophysics
2020-08-26 v3 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We derive a simple model-independent upper bound on the strength of magnetic fields obtained in inflationary and post-inflationary magnetogenesis taking into account the constraints imposed by the condition of weak coupling, back-reaction and Schwinger effect. This bound turns out to be rather low for cosmologically interesting spatial scales. Somewhat higher upper bound is obtained if one assumes that some unknown mechanism suppresses the Schwinger effect in the early universe. Incidentally, we correct our previous estimates for this case.
Keywords
Cite
@article{arxiv.2004.00947,
title = {Model-independent constraints in inflationary magnetogenesis},
author = {Yuri Shtanov and Mykhailo Pavliuk},
journal= {arXiv preprint arXiv:2004.00947},
year = {2020}
}
Comments
18 pages, 2 figures, improved version to appear in JCAP, references added; corrected errors made in arXiv:1902.05894 and arXiv:1911.10424