冷原子光导引的数值模拟计算

Quantum Mechanical Simulation of Optical Guiding for Cold Atoms

本文提出一种基于大的红失谐的高斯光束的冷原子光导引的模型,并且运用数值模拟计算了冷的^(87)Rb原子团在这样的光导引中的量子动力学规律。计算的结果和我们预期的比较符合,而且我们发现导引光束的失谐量和光强对冷原子的有效导引长度有很大的影响,当失谐越大,光强越小,有效导引长度越长。

In this paper, a simple model of optical guide is investigated and the quantum-mechanical dynamics of cold atoms in the optical guide formed by a large red-detuning Gaussian laser beam is calculated. From our simulations, we can conclude that the bigger the laser detuning and the lower the laser intensity we use, the longer the guiding length we can obtain.