Magnetic fields from inflation?

2009/07/06 by Vittoria Demozzi, Viatcheslav Mukhanov, Hector Rubinstein · 2 citations
Physics and Astronomy · #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1088/1475-7516/2009/08/025

published as JCAP 0908:025,2009 · 10 pages

arxiv created 2009/07/06 · arxiv updated 2009/12/01

Abstract

We consider the possibility of generation of the seeds of primordial magnetic field on inflation and show that the effect of the back reaction of this field can be very important. Assuming that back reaction does not spoil inflation we find a rather strong restriction on the amplitude of the primordial seeds which could be generated on inflation. Namely, this amplitude recalculated to the present epoch cannot exceed 10^-32G in Mpc scales. This field seems to be too small to be amplified to the observable values by galactic dynamo mechanism.

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• What is a photon in de Sitter spacetime?
• The Impact of Inhomogeneous Perturbations of the Inflaton on the Cosmological Primordial Magnetic Field

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