Quantum-trajectory Monte Carlo Method and Application in Strong-field Above-threshold Ionization
Above threshold ionization, since its first observation more than three decades ago, has been one of the most intriguing phenomena in the area of strong-field atomic physics.In quantum picture, above threshold ionization is understood as a process of multiphoton absorption through resonant states or non-resonant states.In this work, we measure high resolution photoelectron angular distributions (PADs) for above threshold ionization of xenon atoms in infrared laser fields.Based on the Ammosov-Delone-Krainov (ADK) tunneling theory, we develop an intuitive quantum-trajectory Monte Carlo (QTMC) model encoded with Feynmans path-integral approach, in which the Coulomb effect on electron trajectories and interference patterns are fully considered.We achieve an excellent agreement with the measured PADs of atoms for above threshold ionization.The QTMC theory sheds light on the role of ionic potential on PADs along the longitudinal and transverse direction with respect to the laser polarization, allowing us to unravel the classical coordinates of photoelectron at the tunnel exit, i.e., the tunneling phase and the initial momentum.We study the classical-quantum correspondence for strong field above threshold ionization and build a bridge between the above threshold ionization and the tunneling theory.The QTMC model has a potential to be extended for probing molecular dynamics by combining with the molecular orbital ADK theory.
Above-threshold ionization Ammosov-Delone-Krainov tunneling theory Quantum trajectory Monte Carlo method
Min Li Ji-Wei Geng Hong Liu Yongkai Deng Chengyin Wu Liang-You Peng Qihuang Gong Yunquan Liu
State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 10 State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 10
国际会议
昆明
英文
240-246
2014-05-01（万方平台首次上网日期，不代表论文的发表时间）