Spatial and Temporal Dynamics of Atoms in Intense Laser Fields

这个建议的目的是提供一个更好的理解的非微扰相互作用的物质与激光脉冲的各种系统。在每个拟议的项目中，对非线性量子动力学的理解将主要借助于计算机模拟来推进，以实现空间和时间分辨率。该建议的另一个目的是缩小理论研究与实验工作之间的差距，第一个项目序列侧重于如果激光场足够强以触发或影响从真空中产生电子-正电子对时发生的新现象。这些研究将建立在PI最近开发的计算解决方案技术的基础上，以完全的空间和时间分辨率解决量子场论方程。第二组项目从数值上研究原子和离子在各种静电场、磁场和激光场中从高度相关的相对论状态产生的单电离和双电离机制。第三个项目序列从理论上和实验上探索激光场通过异质电介质随机介质的传播。强激光物理（ILP）研究小组由两名PI，两名博士后和通常八名本科生组成。

This proposal aims at providing a better understanding of the non-perturbative interaction of matter with laser pulses for various systems. In each of the proposed projects, understanding of the nonlinear quantum dynamics will be advanced primarily with the aid of computer simulations to allow for spatial and temporal resolution. It is also an aim of the proposal to narrow the gap between theoretical studies and experimental work.The first sequence of projects focuses on new phenomena that occur if the laser fields are sufficiently intense to either trigger or affect the creation of electron-positron pairs from vacuum. The studies will build on a computational solution technique that has been developed recently by the PIs to solve the quantum field theoretical equations with full spatial and temporal resolution. The second group of projects examines numerically the single and double ionization mechanisms for atoms and ions in various static electric, magnetic and laser fields from highly correlated relativistic states. The third sequence of projects explores theoretically as well as experimentally the propagation of laser fields through heterogeneous dielectric random media.The Intense Laser Physics (ILP) research group consists of two PIs, two postdocs, and typically eight undergraduate students.