2019/07/12 by Yanzeng Zhang, S. I. Krasheninnikov, Zhang, Yanzeng +2 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Laser-Matter Interactions and Applications #Plasma Physics (physics.plasm-ph) #Quantum optics and atomic interactions #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.1907.05539
openalex publication_date 2019/07/12 · arxiv created 2019/08/01 · arxiv updated 2019/08/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The electron dynamics in counter-propagating laser waves is investigated by employing a novel approach, where the new Hamiltonian is time-independent when the perturbative laser wave is absent. The physical picture of stochastic electron dynamics is clearly revealed and the threshold values of the amplitude of the perturbative laser field for triggering stochastic electron acceleration are derived for different laser polarization directions and initial electron momentum. It demonstrates that the dephasing rate (new Hamiltonian) between the electron and the dominant laser can be randomly reduced if the amplitude of the perturbative laser is above the threshold such that the electron could be accelerated by the dominant laser well beyond the ponderomotive energy scaling. The impact of a superluminal phase velocity is examined, which slightly changes the stochastic region in Hamiltonian space if the superluminal phase velocity is under a threshold value but significantly decreases the maximum electron kinetic energy. All the analytic considerations are confirmed by the numerical simulations.