Worldline instantons for the momentum spectrum of Schwinger pair production in space-time dependent fields
Worldline instantons for the momentum spectrum of Schwinger pair production in space-time dependent fields
Degli Esposti, G.; Torgrimsson, G.
Abstract
We show how to use the worldline-instanton formalism to calculate the momentum spectrum of the electron-positron pairs produced by an electric field that depends on both space and time. Using the LSZ reduction formula with a worldline representation for the propagator in a spacetime field, we make use of the saddle-point method to obtain a semiclassical approximation of the pair-production spectrum. In order to check the final result, we integrate the spectrum and compare with the results obtained using a previous instanton method for the imaginary part of the effective action.
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Contribution to WWW
https://arxiv.org/pdf/2212.11578.pdf -
Physical Review D 107(2023)5, 056019
DOI: 10.1103/PhysRevD.107.056019
Cited 3 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-36015