Numerical simulations of strong-field processes in momentum space  

作　　者：Yan Xu Xue-Bin Bian 徐彦;卞学滨(College of Physics and Electronic Engineering,Xinxiang University,Xinxiang 453003,China;State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]College of Physics and Electronic Engineering,Xinxiang University,Xinxiang 453003,China [2]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China

出　　处：《Chinese Physics B》2020年第2期87-90,共4页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2019YFA0307702);the National Natural Science Foundation of China(Grants Nos.91850121 and 11674363);the Science Fund of Educational Department of Henan Province of China(Grant No.2011C140001);the Ninth Group of Key Disciplines in Henan Province,China(Grant No.2018119).

摘　　要：The time-dependent Schrodinger equation(TDSE) is usually treated in the real space in the textbook.However,it makes the numerical simulations of strong-field processes difficult due to the wide dispersion and fast oscillation of the electron wave packets under the interaction of intense laser fields.Here we demonstrate that the TDSE can be efficiently solved in the momentum space.The high-order harmonic generation and above-threshold ionization spectra obtained by numerical solutions of TDSE in momentum space agree well with previous studies in real space,but significantly reducing the computation cost.The time-dependent Schr?dinger equation(TDSE)is usually treated in the real space in the textbook.However,it makes the numerical simulations of strong-field processes difficult due to the wide dispersion and fast oscillation of the electron wave packets under the interaction of intense laser fields.Here we demonstrate that the TDSE can be efficiently solved in the momentum space.The high-order harmonic generation and above-threshold ionization spectra obtained by numerical solutions of TDSE in momentum space agree well with previous studies in real space,but significantly reducing the computation cost.

关 键 词：HIGH-ORDER HARMONIC generation ABOVE-THRESHOLD IONIZATION NUMERICAL method 

分 类 号：O562[理学—原子与分子物理]