Collaborative Research: Few-Body Interactions in Ultracold Quantum Gases

目前的拨款致力于研究几个原子之间的相互作用，以及在与量子气体相关的超冷温度范围内实现量子控制的可能方法。由于相互作用的极端非微扰性，少数原子系统构成了原子物理学理论家面临的一些最大挑战。该提案的目标是开发理论工具，并探索新型共振的基本能力和影响。研究的重点将集中在控制复杂的多通道碰撞动力学和电磁场或静态外场。本项目的一个具体目标是探索使用激光场改变三个或四个原子之间相互作用的可行性。这项工作可能会产生前所未有的影响，产生深远的科学和技术影响。改变原子行为和相互作用的能力将对化学反应动力学的量子控制产生关键影响。对超冷原子相互作用的深入理解将在原子钟、量子信息科学和探索许多新的物质相方面得到应用。这项工作具有重要的教育影响，因为它为研究生和本科生提供了前沿计算和理论研究技术的培训。

The present grant is devoted to the study of interactions among a few atoms and possible ways one can achieve quantum control in the regime of ultracold temperatures relevant for quantum gases. Few-atom systems pose some of the greatest challenges facing theorists in atomic physics because of the extremely nonperturbative nature of the interactions. The goal of the proposal is to develop the theoretical tools and explore the basic capabilities and implications of new types of resonances. The investigation will center on controlling the complex multichannel collision dynamics with electromagnetic or static external fields. A specific aim of the present project is to explore the viability of using a laser field to change the interactions among three or four atoms. The work could potentially have unprecedented impact with far-reaching scientific and technological ramifications. The ability to change atomic behaviors and interactions will have key impact in the quantum control of chemical reaction dynamics. A deep understanding of the ultracold atom interactions will find applications in atomic clocks, quantum information science and for the exploration of many novel phases of matter. The work has an important educational impact as it provides training to graduate and undergraduate students in forefront computational and theoretical research techniques.