Phys. Rev. D 77, 023530 (2008) [12 pages]Primordial magnetic fields and nonlinear electrodynamicsReceived 17 October 2007; published 28 January 2008 The creation of large scale magnetic fields is studied in an inflationary universe where electrodynamics is assumed to be nonlinear. After inflation ends electrodynamics becomes linear and thus the description of reheating and the subsequent radiation dominated stage are unaltered. The nonlinear regime of electrodynamics is described by Lagrangians having a power-law dependence on one of the invariants of the electromagnetic field. It is found that there is a range of parameters for which primordial magnetic fields of cosmologically interesting strengths can be created. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.77.023530
DOI:
10.1103/PhysRevD.77.023530
PACS:
98.80.Cq, 98.62.En
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