Electron-positron pair production in inhomogeneous electromagnetic fields
arXiv:1512.06082
Abstract
The process of electron-positron pair production is investigated within the phase-space Wigner formalism. The similarities between atomic ionization and pair production for homogeneous, but time-dependent linearly polarized electric fields are examined mainly in the regime of multiphoton absorption (field-dependent threshold, above-threshold pair production). Characteristic signatures in the particle spectra are identified (effective mass, channel closing). The non-monotonic dependence of the particle yield on the carrier frequency is discussed as well. The investigations are then extended to spatially inhomogeneous electric fields. New effects arising due to the spatial dependence of the effective mass are discussed in terms of a semi-classical interpretation. An increase in the normalized particle yield is found for various field configurations. Pair production in inhomogeneous electric and magnetic fields is also studied. The influence of a time-dependent spatially inhomogeneous magnetic field on the momentum spectrum and the particle yield is investigated. The Lorentz invariants are identified to be crucial in order to understand pair production by strong electric fields in the presence of strong magnetic fields.
PhD thesis, 130 pages (+80 pages of appendix) more than 50 figures
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- Schwinger pair production in inhomogeneous electric fields with symmetrical frequency chirp
- Chirp effects on pair production in oscillating electric fields with spatial inhomogeneity
- Study of pair production in inhomogeneous two-color electric fields using the computational quantum field theory
- Vortex Structures and Momentum Sharing in Dynamic Sauter-Schwinger Process
- Pair production in inhomogeneous electric fields with phase modulation
- Electron Positron Pair Production in Strong Electric Fields