项目名称: 超快强光场驱动原子分子过程中的多体关联效应研究
项目编号: No.11334009
项目类型: 重点项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 柳晓军
作者单位: 中国科学院武汉物理与数学研究所
项目金额: 325万元
中文摘要: 多体相互作用及电子关联运动一直是物理学研究密切关注的基础问题之一,超快强激光与原子分子的相互作用研究为深入理解电子关联及复杂多体运动提供了重要工具。本项目将结合超快强激光技术和荷电粒子测量方法,研究强光场驱动原子分子过程中的电子关联和多体动力学。通过实验测量原子分子电离、分子解离等碎解过程引起的碎片粒子(如电子和离子)的产量及微分动量分布,系统考察它们随激光场参数及原子分子体系的变化规律。在理论上发展考虑多体相互作用的量子S矩阵理论模型、半经典模型和数值模拟方法,与实验紧密结合,深入揭示电子关联、电子-核关联及外部激光场条件等对强场原子分子过程的影响,在飞秒乃至阿秒时间尺度上揭示原子分子多体关联动力学。
中文关键词: 超快强光场;原子分子;多体;电子关联;电子-核关联
英文摘要: Many-body interaction and electron-electron correlation is one of the fundamental problems in physics. The interaction of atoms and molecules with ultrafast intense laser field provides a measure to study the electron correlation and the complex many-body dynamics. This project investigates the many-body dynamics of atoms and molecules in intense laser field by combing the ultrafast intense laser and the charged particle measurement technology. We experimentally measure the total yield and the differential momentum of the fragmented particles such as electron and ion and analyze their dependence on the laser parameters and the atomic and molecular structures. In the theoretical aspect, we will develop S-matrix theory, semiclassical model and numerical simulation method which take into account the many-body interaction. By comparing the experimental results with the theoretical models, the study aims to uncover the role of electron correlation, electron-nuclear correlation in strong field atomic and molecular processes on ultrafast femtosecond and even attosecond time scale.
英文关键词: ultrafast intense laser field;atoms and molecules;many body;electron correlation;electron-nuclear correlation