Large-scale magnetic fields from inflation in teleparallel gravity
Cosmology and Nongalactic Astrophysics
2014-03-26 v1 General Relativity and Quantum Cosmology
Abstract
Generation of large-scale magnetic fields in inflationary cosmology is studied in teleparallelism, where instead of the scalar curvature in general relativity, the torsion scalar describes the gravity theory. In particular, we investigate a coupling of the electromagnetic field to the torsion scalar during inflation, which leads to the breaking of conformal invariance of the electromagnetic field. We demonstrate that for a power-law type coupling, the current magnetic field strength of G on 1 Mpc scale can be generated, if the backreaction effects and strong coupling problem are not taken into consideration.
Cite
@article{arxiv.1307.7448,
title = {Large-scale magnetic fields from inflation in teleparallel gravity},
author = {Kazuharu Bamba and Chao-Qiang Geng and Ling-Wei Luo},
journal= {arXiv preprint arXiv:1307.7448},
year = {2014}
}
Comments
4 pages, no figure, to be published in the Proceedings of the "12th Asia Pacific Physics Conference."