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

Glavan, Dražen;Rigopoulos, Gerasimos
(2021) Journal of Cosmology and Astroparticle Physics — Vol. 02 (2021)

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  • Glavan, DraženUCLouvain
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  • Rigopoulos, Gerasimos
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Abstract
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.
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Glavan, D., & Rigopoulos, G. (2021). One-loop electromagnetic correlators of SQED in power-law inflation. Journal of Cosmology and Astroparticle Physics, 02. https://doi.org/10.1088/1475-7516/2021/02/021 (Original work published 2021)