Is inflationary magnetogenesis sensitive to the post-inflationary history ?
Cosmology and Nongalactic Astrophysics
2025-09-30 v2 High Energy Physics - Phenomenology
Abstract
Considering inflationary magnetogenesis induced by time-dependent kinetic and axial couplings of a massless Abelian vector boson field breaking the conformal invariance we show in this article that, surprisingly, the spectral shape of the large-scale primordial magnetic field power spectrum is insensitive to the post-inflationary history, namely the barotropic parameter () and the gauge coupling functions of the post-inflationary era.
Cite
@article{arxiv.2412.10367,
title = {Is inflationary magnetogenesis sensitive to the post-inflationary history ?},
author = {Konstantinos Dimopoulos and Anish Ghoshal and Theodoros Papanikolaou},
journal= {arXiv preprint arXiv:2412.10367},
year = {2025}
}
Comments
5 pages, plus references; minor text additions, matches published version in PRD