First WKB and worldline-instanton calculations of nonlinear trident in time-dependent and spacetime-dependent electric fields, including direct and exchange terms and a Coulomb suppression factor.
Two-photon Compton process in pulsed intense laser fields
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abstract
Based on strong-field QED in the Furry picture we use the Dirac-Volkov propagator to derive a compact expression for the differential emission probability of the two-photon Compton process in a pulsed intense laser field. The relation of real and virtual intermediate states is discussed, and the natural regularization of the on-shell contributions due to the finite laser pulse is highlighted. The inclusive two-photon spectrum is two orders of magnitude stronger than expected from a perturbative estimate.
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Nonlinear trident using WKB and worldline instantons
First WKB and worldline-instanton calculations of nonlinear trident in time-dependent and spacetime-dependent electric fields, including direct and exchange terms and a Coulomb suppression factor.