Photon Mass from Inflation
- 15 August 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 89 (10) , 101301
Abstract
We consider vacuum polarization from massless scalar electrodynamics in de Sitter inflation. The theory exhibits a dimensional analog 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 nonvanishing of the photon mass during inflation may result in magnetic fields on cosmological scales.
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