Varying electromagnetic coupling and primordial magnetic fields

O. Bertolami and R. Monteiro
Phys. Rev. D 71, 123525 – Published 24 June 2005

Abstract

We study the effect of variations of the electromagnetic coupling on the process of generation of primordial magnetic fields. We find that only through a significant growth of the electromagnetic coupling can minimum seed fields be produced. We also show that, if through some process in the early Universe the photon acquires a mass that leads, thanks to inflation, to the generation of primordial magnetic fields, then the influence of variations of the electromagnetic coupling amounts essentially to the results due to the photon effective mass alone.

  • Figure
  • Received 8 April 2005

DOI:https://doi.org/10.1103/PhysRevD.71.123525

©2005 American Physical Society

Authors & Affiliations

O. Bertolami* and R. Monteiro

  • Departamento de Física, Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal

  • *Electronic address: orfeu@cosmos.ist.utl.pt
  • Electronic address: ricardo58monteiro@gmail.com

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Issue

Vol. 71, Iss. 12 — 15 June 2005

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