Photon mass from inflation

Details Photon mass from inflation Photon mass from inflation

2002-05-20

arxiv.org/abs/astro-ph/0205331v1

Phys.Rev.Lett.89:101301,2002

Astronomy and Astrophysics

Astrophysics

RevTeX, 4 pages, 2 eps figures

Scientific paper

10.1103/PhysRevLett.89.101301

We consider vacuum polarization from massless scalar electrodynamics in de Sitter inflation. The theory exhibits a 3+1 dimensional analogue of the Schwinger mechanism in which a photon mass is dynamically generated. The mechanism is generic for light scalar fields that couple minimally to gravity. The non-vanishing of the photon mass during inflation may result in magnetic fields on cosmological scales.

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