Magnetic field induced by vacuum polarization in de Sitter spacetime

Physics

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Theory Of Quantized Fields, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

We derive the effective Lagrangian of a magnetic field in the context of a massless scalar QED coupled to gravity in de Sitter spacetime. It is found that the magnetic field is produced at the beginning of the inflation in a minimally coupled scalar QED, and that the intensity B is proportional to eH2 (H is the Hubble constant). When H=1015 GeV, B~1.3×1047 G.

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