海南大学学报（自然科学版）2025，Vol.43Issue(6)：694-702,9.DOI:10.15886/j.cnki.hndk.2025062001
强激光场电离中库仑效应的理论分析与数值模拟
Theoretical analysis and numerical simulation of the Coulomb effect in strong laser field ionization
摘要
Abstract
The strong-field approximation(SFA)is computationally convenient and provides a clear physical picture,but it neglects the Coulomb interaction between the ionized electron and the parent ion,which may lead to inaccuracies in predicting certain details.In this work,we first introduce the Coulomb-Volkov approximation(CVA),which incorporates the effect of the Coulomb potential on the basis of the SFA.We then compare the results obtained from these two methods with those from the time-dependent Schrödinger equation(TDSE),analyzing their predictive performance for photoelectron momentum distributions in different laser fields.The results demonstrate that the CVA not only retains the computational advantages of the SFA,but also better reproduces the interference structures and angular features observed in the TDSE calculations,thereby contributing to a more accurate understanding of the role of the Coulomb potential in the ionization process under strong laser fields.关键词
强场电离/强场近似方法/库仑-沃尔科夫近似方法/含时薛定谔方程Key words
strong-field ionization/strong-field approximation/coulomb-volkov approximation/time-dependent Schrödinger equation分类
数理科学引用本文复制引用
ZHUO Zeyan,PENG Yigen,LIU Xiwang..强激光场电离中库仑效应的理论分析与数值模拟[J].海南大学学报（自然科学版）,2025,43(6):694-702,9.基金项目
国家自然科学基金青年项目(12204135) （12204135）
海南省自然科学基金高层次人才项目(125RC626) （125RC626）
