The worldline formalism in strong-field QED

Abstract

The worldline formalism provides an alternative to Feynman diagrams that has been found particularly useful for external-field calculations in quantum electrodynamics. Here I summarize its present range of applications, which includes Schwinger pair creation, photon splitting in constant fields and plane-wave backgrounds, as well as nonlinear Compton scattering in constant fields.

Comments: 10 pages, 2 figures, extended version of talk given at LPHYS'22, Seminar 9: Extreme Light Technologies, Science, and Applications