转动传能中的量子干涉——干涉角和转动量子数的关系

Collisional quantum interference on rotational energy transfer: The relationship between the interference angle and the rotational quantum number

沙国河等人在CO(A1∏(v=0)～e3∑-(v=1))体系与He, Ne 和Ar碰撞诱导转动传能中首次观测到了量子干涉效应,并测量了干涉度.从理论上进一步研究原子-双原子分子体系碰撞诱导转动传能中量子干涉效应与转动量子数以及能量间隔的关系是十分必要的.我们考虑长程相互作用势,应用一级玻恩近似和直线轨迹近似,分别计算了CO(A1∏(v=0)～e3∑-(v=1))体系和He, Ne,Ar碰撞诱导转动传能中不同转动量子数以及不同能量间隔下的干涉角,得到了干涉角随转动量子数和能量间隔的变化趋势.这些结果对设计、分析这种类型的实验有一定的指导意义.

The observation of collisional quantum interference in intramolecular rotational energy transfer was obtained by Sha and co-workers in the CO（A^1∏（v=0）～e^3∑-（v=1）） system in collision with He, Ne and Ar., The interference degree was measured. Based on the first-Born approximation of time dependent perturbation theory, taking into account the long-range interaction potential and the“straight-line” trajectory approximation, we calculated respectively the interference angle with the different rotational quantum number, the different energy gap of collisional quantum interference rotational energy transfer in an atomdiatom system, the changing tendency of differential interference angle is obtained. This theoretical model is important to understanding or performing this kind of experiments.