Phys. Rev. D 46, 5346–5351 (1992)Primordial magnetic fields from pseudo Goldstone bosonsReceived 21 July 1992; published in the issue dated 15 December 1992 The existence of large-scale magnetic fields in galaxies is well established, but there is no accepted mechanism for generating a primordial field which could grow into what is observed today. We discuss a model which attempts to account for the necessary primordial field by invoking a pseudo Goldstone boson coupled to electromagnetism. The evolution of this boson during inflation generates a magnetic field; however, it seems difficult on rather general grounds to obtain fields of sufficient strength on astrophysically interesting scales. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.46.5346
DOI:
10.1103/PhysRevD.46.5346
PACS:
14.80.Gt, 95.30.Cq, 98.60.Jk
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