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.

该项目涉及通过强激光光对原子双电离的计算机建模。拟议的工作主要基于经典力学而不是量子力学。它使用了400,000个经典的两电子原子的合奏，每个原子的初始条件都略有不同，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烈的红外激光脉冲及时演变，并分析最终状态。然后，证明所需的最终特征的原子会回溯以了解其历史。目的是增加对双电离过程的动力学的了解，尤其是对回忆的动力学，这是一个电子被电离的过程，但由于激光场的振荡激光场返回到阳性离子和其他电子。