Ferromagnetic vacuum and galactic magnetic fields
Feb, 19946 pages
Published in:
- Phys.Lett.B 329 (1994) 195-198
e-Print:
- hep-ph/9402295 [hep-ph]
Report number:
- NORDITA-94-6-PA
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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.- galaxy
- vacuum state: ferromagnet
- magnetic field: galaxy
- finite temperature
- gauge field theory: SU(N)
- grand unified theory
- critical phenomena
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