近日，德国马尔堡-菲利普大学的Jan H. Thiede与波兰雅盖隆大学的Jakub S. Prauzner-Bechcicki合作并取得一项新进展。经过不懈努力，他们揭示了强激光场中原子非顺序双电离的频率依赖性。相关研究成果已于2024年11月12日在国际知名学术期刊《物理评论A》上发表。
该研究团队证实一个简化的（1+1）维氦原子模型的通用性，该模型能够在广泛的频率和强度范围内，研究强激光场中的非顺序双电离现象。
采用该方法得到的电离产额、离子纵向动量分布以及双电子动量分布，与文献中的实验和半经典数据高度吻合，从而为其提供了量子力学的描述补充。该方法可扩展应用于其他原子种类或更高电离态的研究。
据悉，在强激光场中，对双电离现象进行全维度的量子力学描述在计算上仍然极具挑战性。
附：英文原文
Title: Frequency dependence of nonsequential double ionization of atoms in strong laser fields
Author: Jan H. Thiede, Jakub S. Prauzner-Bechcicki
Issue&Volume: 2024/11/12
Abstract: The full-dimensional quantum mechanical description of double ionization in strong laser fields is still computationally very demanding. We demonstrate the versatility of a simplified (1+1)-dimensional model of the He atom, which allows the study of nonsequential double ionization in strong laser fields over a wide range of frequencies and intensities. The ionization yield, longitudinal ion momentum distributions, and two-electron momentum distributions obtained by using the applied approach are in good agreement with the experimental and semi-classical data available in the literature, thus complementing them with a quantum mechanical description. The methodology can be extended to other atomic species or to study higher ionization.
DOI: 10.1103/PhysRevA.110.053105
Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.053105