Camille Bonvin, Chiara Caprini, Ruth Durrer
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.
View original:
http://arxiv.org/abs/1112.3901
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