Fundamental Studies of Molecular Collisions and Chemical Reactions at Ultracold Temperatures

近两年来分子玻色-爱因斯坦凝聚的实验实现，加强了对超冷分子的研究，超冷分子的碰撞性质已成为一个备受实验和理论关注的课题。本提案的目的是探讨当前超冷分子研究的三个关键问题：(i)开发用于描述超冷分子碰撞特性的计算算法，特别强调超冷分子-分子碰撞；（二）探索影响超低温下化学反应性的因素，特别是远距离相互作用如何影响低温和超低温下的化学反应性；（三）探索涉及超冷极性分子的双分子散射中化学反应性的相干控制。所有三个提议的主题将使用明确的量子力学计算来解决。

The experimental realization of molecular Bose-Einstein condensation in the last two years hasintensified research on ultracold molecules and collisional properties of ultracold molecules havebecome a topic of considerable experimental and theoretical interest. The objective of this pro-posal is to explore three key issues that are central to current research in ultracold molecules: (i)development of a computational algorithm for the description of collisional properties of ultracoldmolecules with special emphasis on ultracold molecule-molecule collisions; (ii) exploration of factors influencing chemical reactivity at ultralow temperatures, in particular, how long-range interaction influences chemical reactivity at cold and ultracold temperatures; (iii) exploration of coherent control of chemical reactivity in bimolecular scattering involving ultracold polar molecules.All three proposed topics will be addressed using explicit quantum mechanical calculations.