Particle dynamics and spatial $e^{-}{e}^{+}$ density structures at QED cascading in circularly polarized standing waves

Abstract

We present a comprehensive analysis of longitudinal particle drifting in a standing circularly polarized wave at extreme intensities when quantum radiation reaction (RR) effects should be accounted for. To get an insight into the physics of this phenomenon we made a comparative study considering the RR force in the Landau-Lifshitz or quantum-corrected form, including the case of photon emission stochasticity. It is shown that the cases of circular and linear polarization are qualitatively different. Moreover, specific features of particle dynamics have a strong impact on spatial structures of the electron-positron ($e^{-}{e}^{+}$) density created in vacuum through quantum electrodynamic (QED) cascades in counter-propagating laser pulses. 3D PIC modeling accounting for QED effects confirms realization of different pair plasma structures.

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• Asymptotic electron motion in strong radiation-dominated regime
• Particle trajectories, gamma-ray emission, and anomalous radiative trapping effects in magnetic dipole wave
• Seed and vacuum pair production in strong laser field
• Optimized routines for event generators in QED-PIC codes
• Optimized event generator for strong-field QED simulations within the hi-$\chi$ framework
• Particle dynamics governed by radiation losses in extreme-field current sheets
• High-Performance Implementation of the Optimized Event Generator for Strong-Field QED Plasma Simulations