华中科技大学学报（自然科学版）2025，Vol.53Issue(9)：46-51,89,7.DOI:10.13245/j.hust.250777
玻姆轨迹分辨的强场原子电离动力学机制研究
Study on ionization mechanism of atomic ionization resolved by Bohmian trajectories in strong laser fields
摘要
Abstract
The ionization dynamic mechanism of hydrogen atom in the strong laser fields was investigated based on Bohmian mechanics.By analyzing the Bohmian trajectories and the corresponding energy changes of three different ionization dynamics processes of atoms driven by strong fields,as well as the competitive mechanisms of electric fields,Coulomb fields,and quantum fields interacting with electron,it was found that quantum force and Coulomb force suppress the motion of electron when electron is not excited for ionization.After electron ionization,electric field force guides the motion of electron,and quantum force has a promoting or inhibiting effect on the motion of electron depending on their different motion states.In order to further understand the dynamic of atomic ionization driven by the strong fields,the temporal variation of the total energy of the ionization and return processes of atom in the strong laser fields was calculated.By comparing the results of the semi-classical method and the Bohmian mechanics method,it can find that the ionization time of electron that contribute to high-order harmonic generation calculated by Bohmian mechanics lags behind that calculated by the semi-classical method.The calculated results are more consistent with the experiment because the effect of quantum force on electron motion is considered.关键词
玻姆力学/薛定谔方程/强激光场/量子力/高次谐波Key words
Bohmian mechanics/Schrödinger equation/strong laser field/quantum force/high-order harmonic generation分类
数理科学引用本文复制引用
张晶晶,兰森,任文武,李鹏程..玻姆轨迹分辨的强场原子电离动力学机制研究[J].华中科技大学学报（自然科学版）,2025,53(9):46-51,89,7.基金项目
国家自然科学基金资助项目(12074239) （12074239）
广东省自然科学基金资助项目(2025A1515011278) （2025A1515011278）
广东省普通高校重点领域专项项目(2024ZDZX1020) （2024ZDZX1020）
李嘉诚基金会STU-GTIIT联合研究项目(2024LKSFG02). （2024LKSFG02）
