Analytical tools for investigating strong-field QED processes in tightly focused laser fields

Abstract

The present paper is the natural continuation of the letter [Phys. Rev. Lett. \textbf{113}, 040402 (2014)], where the electron wave functions in the presence of a background electromagnetic field of general space-time structure have been constructed analytically, assuming that the initial energy of the electron is the largest dynamical energy scale in the problem and having in mind the case of a background tightly focused laser beam. Here, we determine the scalar and the spinor propagators under the same approximations, which are useful tools for calculating, e.g., total probabilities of processes occurring in such complex electromagnetic fields. In addition, we also present a simpler and more general expression of the electron wave functions found in [Phys. Rev. Lett. \textbf{113}, 040402 (2014)] and we indicate a substitution rule to obtain them starting from the well-known Volkov wave functions in a plane-wave field.

31 pages, no figures

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Cited by in corpus (12)

• Nonlinear Breit-Wheeler pair production in a tightly focused laser beam
• First-order strong-field QED processes in a tightly focused laser beam
• Focussing effects in laser-electron Thomson scattering
• Classical and quantum dynamics of a charged scalar particle in a background of two counterpropagating plane waves
• Fully polarized nonlinear Breit-Wheeler pair production in pulsed plane waves
• Doubly assisted Sauter-Schwinger effect
• Numerical approach to the semiclassical method of radiation emission for arbitrary electron spin and photon polarization
• Efficiently parallelized modeling of tightly focused, large bandwidth laser pulses
• Optimal photon polarization toward the observation of the nonlinear Breit-Wheeler pair production
• On beam models and their paraxial approximation
• The electron mass shift in an intense plane wave
• Ultrarelativistic electrons in counterpropagating laser beams