One-loop electromagnetic correlators of SQED in power-law inflation

We examine scalar quantum electrodynamics in power-law inflation, and compute the one-loop correction to electric and magnetic field correlators at superhorizon separations. The effect at one-loop descends from the coupling of the vector to the charged scalar current which is greatly enhanced due to...

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Bibliographic Details
Published inJournal of cosmology and astroparticle physics Vol. 2021; no. 2; p. 21
Main Authors Glavan, Dražen, Rigopoulos, Gerasimos
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.02.2021
Subjects
Correlation
Correlators
Magnetic fields
Particle production
Power law
Quantum electrodynamics
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Summary:We examine scalar quantum electrodynamics in power-law inflation, and compute the one-loop correction to electric and magnetic field correlators at superhorizon separations. The effect at one-loop descends from the coupling of the vector to the charged scalar current which is greatly enhanced due to gravitational particle production. We conclude that non-perturbative effects must exist due to (i) secular growth, (ii) spatial running, and (iii) infrared sensitivity of the one-loop correction to the correlators. Electric and magnetic correlators exhibit a hierarchy that is due to Faraday's law and accelerated expansion, and must hold non-perturbatively.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2021/02/021