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arXiv · 0806.1856

Large-scale magnetic fields from inflation due to Chern-Simons-like effective interaction

K. Bamba·C. Q. Geng·S. H. Ho
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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 $\sim 10^{-9}$G at the present time can be generated even for the scale of the effective interaction being the Planck scale.

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K. Bamba, C. Q. Geng, S. H. Ho. 2008-10-31. Large-scale magnetic fields from inflation due to Chern-Simons-like effective interaction. https://doi.org/10.1088/1475-7516/2008/11/013

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