Loops and polarization in strong-field QED

Abstract In a previous paper we showed how higher-order strong-field-QED processes in long laser pulses can be approximated by multiplying sequences of ‘strong-field Mueller matrices’. We obtained expressions that are valid for arbitrary field shape and polarization. In this paper we derive practica...

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Bibliographic Details
Published inNew journal of physics Vol. 23; no. 6; pp. 65001 - 65037
Main Author Torgrimsson, Greger
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.06.2021
Subjects
cascades
high-intensity lasers
loops
Physics
Polarization (spin alignment)
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Summary:Abstract In a previous paper we showed how higher-order strong-field-QED processes in long laser pulses can be approximated by multiplying sequences of ‘strong-field Mueller matrices’. We obtained expressions that are valid for arbitrary field shape and polarization. In this paper we derive practical approximations of these Mueller matrices in the locally-constant- and the locally-monochromatic-field regimes. The spin and polarization can also change due to loop contributions (the mass operator for electrons and the polarization operator for photons). We derive Mueller matrices for these as well, for arbitrary laser polarization and arbitrarily polarized initial and final particles.
Bibliography:NJP-113015.R2
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/abf274