Nonperturbative quantum electrodynamics in a photon-condensate background field

1 December 1988

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 38 (11) , 3578-3581
https://doi.org/10.1103/physrevd.38.3578

Abstract

Analyses of the Schwinger-Dyson (SD) equation for the fermion self-energy have revealed the existence of a QED ultraviolet nonperturbative fixed point which separates a strong-coupling regime from a weak-coupling regime. Here we study the SD equation in the presence of a weak constant photon-condensate background field. This background field does not seem to affect the fixed point. Better approximations or some more realistic background fields may change the result. The investigation is partly motivated by recent heavy-ion experiments.

Keywords

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