Derives mean photon number density to order α² and mean EM field to order e³ in pair-producing backgrounds using the Keldysh-Schwinger-Fradkin nonequilibrium technique, expressed via exact Dirac solutions.
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In dynamically assisted Schwinger pair production with bichromatic circularly polarized fields, the ratio of opposite-helicity momentum distributions depends mainly on polar angle and only weakly on magnitude or azimuth.
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Vacuum photon emission and mean electromagnetic field in pair-creating external backgrounds
Derives mean photon number density to order α² and mean EM field to order e³ in pair-producing backgrounds using the Keldysh-Schwinger-Fradkin nonequilibrium technique, expressed via exact Dirac solutions.
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Helicity effects in the dynamically assisted Schwinger mechanism
In dynamically assisted Schwinger pair production with bichromatic circularly polarized fields, the ratio of opposite-helicity momentum distributions depends mainly on polar angle and only weakly on magnitude or azimuth.