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arXiv · hep-ph/9402295

Ferromagnetic Vacuum and Galactic Magnetic Fields

Kari Enqvist·Poul Olesen
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Abstract

Non-abelian gauge theories may have a ferromagnet-like vacuum with a non-zero magnetic field, which also exists at finite temperature. We argue that the formation of the ferromagnet-like vacuum at GUT scales gives rise to a Maxwell magnetic field imprinted on the comoving plasma, and that it is energetically favourable to align the field in different correlation volumes. This results in a coherent magnetic field pertaining the whole universe, with a magnitude $B_{now}\simeq 10^{-14}\G$, which is of the correct size to serve as the seed field for the galactic dynamo.

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Kari Enqvist, Poul Olesen. 1994-02-16. Ferromagnetic Vacuum and Galactic Magnetic Fields. https://doi.org/10.1016/0370-2693(94)90760-9

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