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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Channel Interference in Optical Collisions of Cold Atom Beams
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Channel Interference in Optical Collisions of Cold Atom Beams

机译：冷原子束光学碰撞中的通道干扰

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摘要

Experiments were conducted recently (by Weiner and co-workers) on the optical shielding (suppression) of atomic collisions in cold-atom beams, and its variation with the angle between the polarization direction of the shielding light and the direction of approach of the beam. This case is shown here to be a typical example of an optical collision in which quantum interference may persevere between two incident collision partial waves leading to the same output state. This effect depends on the relative collisional phase shift of the two interfering channels, as well as on the angle of approach, and will vanish when averaging over the latter (as with collisions in the bulk). The extent of variation of this interference effect with the relative phase shift is quite broad, and may lead, under favorable conditions, to almost complete shielding at a finite value of the shielding-laser power. The latter observation leaves open the possibility of exerting coherent control over the interference effect in order to optimize the shielding.
机译：最近（由Weiner和他的同事们）对冷原子束中的原子碰撞的光屏蔽（抑制）进行了实验，并且实验结果表明，该光屏蔽是随着屏蔽光的偏振方向和光束接近方向之间的夹角而变化的。 。此处显示的这种情况是光学碰撞的典型示例，其中量子干扰可能会在导致相同输出状态的两个入射碰撞分波之间持续存在。该效果取决于两个干扰通道的相对碰撞相移以及接近角，并且在对后者进行平均时会消失（与整体碰撞一样）。这种干扰效应随相对相移的变化程度相当大，并且在有利的条件下，可能会导致在有限的屏蔽激光功率下几乎完全屏蔽。后一观察结果留出了对干扰效应进行相干控制以优化屏蔽的可能性。

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