中国物理B ›› 2020, Vol. 29 ›› Issue (11): 113201-.doi: 10.1088/1674-1056/abb22e

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Yang Song(宋阳)1,3, Shu Han(韩姝)2, Yu-Jun Yang(杨玉军)3, Fu-Ming Guo(郭福明)3,†(), Su-Yu Li(李苏宇)3,()   

  • 收稿日期:2020-04-24 修回日期:2020-08-09 接受日期:2020-08-25 出版日期:2020-11-05 发布日期:2020-11-03

Ionization of two-electron atom (xenon) studied by Bohmian mechanics theory

Yang Song(宋阳)1,3 , Shu Han(韩姝)2 , Yu-Jun Yang(杨玉军)3, Fu-Ming Guo(郭福明)3, †, and Su-Yu Li(李苏宇)3,, ‡   

  1. 1 College of Science, Northeast Electric Power University, Jilin 132012, China
    2 Archives, Northeast Electric Power University, Jilin 132012, China
    3 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • Received:2020-04-24 Revised:2020-08-09 Accepted:2020-08-25 Online:2020-11-05 Published:2020-11-03
  • Contact: Corresponding author. E-mail: guofm@jlu.edu.cn Corresponding author. E-mail: sylee@jlu.edu.cn
  • Supported by:
    the Jilin Provincial Science and Technology Development Plan Program for Excellent Youth Talents, China (Grant No. 20180520174JH) and the National Natural Science Foundation of China (Grant Nos. 11704145, 11904050, 11774129, 11747007, 11534004, and 12074145).

Abstract:

The ionization dynamics of two-electron atom in an intense laser field is studied by the Bohmian mechanics (BM) theory, and the xenon atomic potential function is used as a model. The single ionization process and double ionization process are calculated by the BM theory and their results are in good agreement with those calculated by numerically solving the time-dependent Schrödinger equation. The analyses of the types, trajectories, and forces of Bohmian particles (BPs) undergoing the single and double ionizations indicate that the re-collision process accounts for a considerable proportion in the singly ionized cases. Furthermore, the analysis of the work done by the external force acting on the BPs shows that the quantum force plays an important role in the re-collision process. This work is helpful in understanding the ionization of two-electron atom in an intense laser field.

Key words: Bohmian mechanics, quantum force, atomic ionization, re-collision process