Quasiclassical approach to high-energy QED processes in strong laser and atomic fields

Abstract

An approach, based on the use of the quasiclassical Green's function, is developed for investigating high-energy quantum electrodynamical processes in combined strong laser and atomic fields. Employing an operator technique, we derive the Green's function of the Dirac equation in an arbitrary plane wave and a localized potential. Then, we calculate the total cross section of high-energy electron-positron photoproduction in an atomic field of arbitrary charge number (Bethe-Heitler process) in the presence of a strong laser field. It is shown that the laser field substantially modifies the cross section at already available incoming photon energies and laser parameters. This makes it feasible to observe the analogous effect in a laser field of the Landau-Pomeranchuk-Migdal effect for the Bethe-Heitler process.

arXiv comment5 pages, 1 figure

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• Axion-like-particle decay in strong electromagnetic backgrounds
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• High-energy $e^{+}{e}^{-}$ photoproduction in the field of a heavy atom accompanied by bremsstrahlung
• Ultrarelativistic quasiclassical wave functions in strong laser and atomic fields
• Spin effects in strong-field laser-electron interactions
• Double bremsstrahlung from high-energy electron in the atomic field
• Resonant amplification of a relativistic electron bremsstrahlung on an atom in the undulator field
• Bound-free electron-positron pair production in combined Coulomb and constant crossed electromagnetic fields: a Schwinger-like process with intrinsic assistance