Large-scale magnetic fields from inflation due to Chern-Simons-like effective interaction
Abstract
We discuss the generation of large-scale magnetic fields due to the breaking of the conformal invariance in the electromagnetic field through the CPT-even dimension-six Chern-Simons-like effective interaction with a fermion current in inflationary cosmology. It is shown that the magnetic fields on 1Mpc scale with the field strength of 10-9G at the present time can be generated even for the scale of the effective interaction being the Planck scale.
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