The enhancement of efficiency of high-order harmonic in intense laser field based on asymptotic boundary conditions and symplectic algorithm

作     者：Zhang, Chunli Liu, Xueshen Ding, Pezhu Qi, Yueying 

作者机构：Jilin Univ Inst Atom & Mol Phys Changchun 130012 Peoples R China Jiaxing Univ Sch Elect Engn Jiaxing 314001 Peoples R China 

出 版 物：《JOURNAL OF MATHEMATICAL CHEMISTRY》 (数学化学杂志)

年 卷 期：2006年第39卷第3-4期

页      面：451-463页

核心收录：

学科分类：07[理学] 0703[理学-化学] 0701[理学-数学] 

基　　金：Young Teacher Foundation of Jilin University National Natural Science Foundation of China, NSFC, (10171039, 10571074, 10574057) Ministry of Education of the People's Republic of China, MOE 

主　　题：asymptotic boundary condition symplectic algorithm high-order harmonic generation superposition state 

摘      要：Asymptotic boundary condition (ABC) of laser-atom interaction presented recently is applied to transform the initial value problem of the time-dependent Schradinger equation (TDSE) in infinite space into the initial and boundary value problem in the finite space, and then the TDSE is discretized into linear canonical equations by substituting the symmetry difference quotient for the 2-order partial derivative. The canonical equation is solved by symplectic algorithm. The ground state and the equal weight coherent superposition of the ground state and the first excited state have been taken as the initial conditions, respectively, while we calculate the population of bound states, the evolution of average distance and the high-order harmonic generation (HHG). The conversion efficiency of HHG can be enhanced by initial coherent superposition state and moderate laser intensities.