Spatial and Temporal Dynamics of Atoms in Intense Laser Fields

这一建议的目的是提供一个更好的理解物质与激光脉冲的各种系统的非摄动相互作用。在每个提议的项目中，对非线性量子动力学的理解将主要借助计算机模拟来推进，以允许空间和时间分辨率。缩小理论研究与实验工作之间的差距也是本建议的目的之一。第一个项目序列关注的是，如果激光场足够强，能够触发或影响真空中电子-正电子对的产生，就会出现新的现象。这些研究将建立在pi最近开发的计算解决技术的基础上，该技术用于解决具有完整空间和时间分辨率的量子场理论方程。第二组项目在数值上研究了原子和离子在高度相关的相对论态的各种静电、磁场和激光场中的单电离和双电离机制。第三个项目从理论上和实验上探讨了激光场在非均匀介电随机介质中的传播。强激光物理（ILP）研究小组由两名pi，两名博士后和八名本科生组成。

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.