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Photon mass from inflation

Tomislav Prokopec·Ola Tornkvist·Richard Woodard
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Abstract

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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Tomislav Prokopec, Ola Tornkvist, Richard Woodard. 2002-05-20. Photon mass from inflation. https://doi.org/10.1103/physrevlett.89.101301

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