Primordial magnetic fields from the post-inflationary universe

We explore cosmological magnetogenesis in the post-inflationary universe, when the inflaton oscillates around its potential minimum and the universe is effectively dominated by cold matter. During this epoch prior to reheating, large-scale magnetic fields can be significantly produced by the cosmolo...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2014-05, Vol.2014 (5), p.i-29
Main Author: Kobayashi, Takeshi
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMOLOGICAL INFLATION
Cosmology
Couplings
ELECTRIC FIELDS
Heating
Inflation
INFLATIONARY UNIVERSE
MAGNETIC FIELDS
MATTER
POTENTIALS
Reheating
UNIVERSE
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Summary:We explore cosmological magnetogenesis in the post-inflationary universe, when the inflaton oscillates around its potential minimum and the universe is effectively dominated by cold matter. During this epoch prior to reheating, large-scale magnetic fields can be significantly produced by the cosmological background. By considering magnetogenesis both during and after inflation, we demonstrate that magnetic fields stronger than 10 super(-15) G can be generated on Mpc scales without having strong couplings in the theory, or producing too large electric fields that would dominate the universe.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2014/05/040