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 Schrdinger 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.

采用Bohmian力学(BM)理论研究强激光场中二电子原子的电离动力学，并以氙原子势函数为模型。采用BM理论计算了单电离过程和双电离过程，其结果与数值求解瞬态薛定谔方程计算的结果吻合较好。对经历单电离和双电离的波希米亚粒子（BPs）的类型、轨迹和力的分析表明，在单电离情况下，再碰撞过程占了相当大的比例。此外，对外力作用在 BP 上所做的功的分析表明，量子力在再碰撞过程中起着重要作用。