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 10-15 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. © 2014 IOP Publishing Ltd and Sissa Medialab srl.
Primordial magnetic fields from the post-inflationary universe / Kobayashi, T.. - In: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. - ISSN 1475-7516. - 2014:5(2014), pp. 1-29. [10.1088/1475-7516/2014/05/040]
Primordial magnetic fields from the post-inflationary universe
Kobayashi T.
2014-01-01
Abstract
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 10-15 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. © 2014 IOP Publishing Ltd and Sissa Medialab srl.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
