RUI: Classical and Quantum Studies of Non-Sequential Multiple Ionization of Atoms in Strong Laser Fields

RUI：强激光场中原子非顺序多次电离的经典和量子研究

• 批准号: 0653526
• 负责人: Stanley Haan
• 金额: --
• 依托单位: Calvin University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-05-01 至 2011-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653526&HistoricalAwards=false
• 关键词: RUI; Classical; Quantum; Studies; Non

The project involves computer modeling of double ionization of atoms by intense laser light. The proposed work is based primarily on classical mechanics rather than quantum mechanics. It uses an ensemble of 400,000 classical two-electron atoms, each of which is given slightly different initial conditions, although they all have the same total energy (equal to the energy of the actual helium ground state) and zero angular momentum. Each classical atom is evolved in time through an intense infrared laser pulse, and the final states are analyzed. Atoms that demonstrate desired final characteristics are then backtracked to learn their history. The objective is to obtain increased understanding of the dynamics of the double ionization process, and especially of recollision, which is a process in which one electron is ionized but because of the oscillating laser field returns to the positive ion and recollides with the other electron.

该项目涉及用计算机模拟强激光对原子进行双重电离。拟议的工作主要基于经典力学而不是量子力学。它使用了40万个经典双电子原子的系综，每个原子的初始条件略有不同，尽管它们都具有相同的总能量（等于实际氦基态的能量）和零角动量。 每个经典原子通过强红外激光脉冲随时间演化，并分析了最终状态。然后，展示出期望的最终特性的原子被回溯以学习它们的历史。其目的是获得更多的双电离过程的动力学的理解，特别是双电离，这是一个过程中，一个电子被电离，但由于振荡激光场返回到正离子和双电离与其他电子。