Quantum Stochasticity Effects on Angular Distributions in Electron-Beam Collision with Laser Pulse

摘要: This study investigates the influence of quantum stochasticity on angular distributions of electrons and positrons generated during the interaction between a laser wakefield acceleration (LWFA) electron beam and ultra-intense laser pulses. Distinct features are identified in the angular distributions of both the electron beam and high-energy photons, offering a crucial diagnostic tool for probing strong-field QED phenomena. While the kinetics of electrons in the laser field are typically governed by the deterministic Landau-Lifshitz (LL) equation. Furthermore, quantum stochastic effects(QSE) substantially affects the angular evolution and energy spectrum of the electron beam exhibit different behaviors. For high energy photons, the impact of QSE on the average divergence evolution due to lepton pair production. The detection and analysis of these characteristic signals provide crucial empirical insights for advancing LWFA-driven all-optical radiation sources and optimizing lepton pair production techniques.