Magnetic fields from inflation: the fatal transition to the radiation era

Details Magnetic fields from inflation: the fatal transition to the radiation era Magnetic fields from inflation: the fatal transition to the radiation era

2011-12-16

arxiv.org/abs/1112.3901v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

16 pages, no figures

Scientific paper

We show that magnetic fields generated during inflation, if they are sufficient to provide the seeds for the observed large scale fields in galaxies, clusters and voids, generically lead to large metric fluctuations during the subsequent radiation era. The ratio of the Weyl tensor generated from magnetic fields during inflation to the Ricci tensor grows in the radiation dominated era to become larger than unity. This is in flagrant contradiction with the homogeneity and isotropy of the observed Universe.

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