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

该项目涉及到强激光对原子双电离的计算机模拟。提出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集合，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。通过强红外激光脉冲对每个经典原子进行时间演化，并对其最终态进行分析。表现出所期望的最终特征的原子随后被回溯以了解它们的历史。目的是增加对双电离过程动力学的理解，特别是重电离过程，这是一个电子被电离，但由于振荡激光场返回到正离子并与另一个电子重碰撞的过程。

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.