Atomic motion in the magneto-optical trap consisting of partially spatially coherent laser
Atomic motion in the magneto-optical trap consisting of partially spatially coherent laser
复制标题
由部分空间相干激光组成的磁光陷阱中的原子运动
DOI：
10.1088/1674-1056/24/8/083701
复制
发表时间：
2015
影响因子：
1.7
通讯作者：
Lin Qiang
中科院分区：
文献类型：
--
作者：
Zhang Bao-Wu;Wang Zhao-Ying;Kong De-Long;Zhang Bao-Wu;Lin Qiang
从理论上研究了由部分空间相干激光器（PSCL）组成的磁光阱（MOT）中Rb原子的运动。激光的空间相干性由电光晶体控制。PSCL在Rb原子上引起的耗散力的瞬时空间分布随时间随机变化。模拟结果表明，与全相干激光相比，空间相干激光对原子轨迹有影响；然而，捕获速度和逃逸速度保持不变。主要原因是激光的空间相干性在时间和空间上存在波动，而光子的平均散射率变化不大，这使得原子总数和原子密度分布保持不变。
Rb atom motion in a magneto–optical trap (MOT) consisting of a partially spatially coherent laser (PSCL) is investigated theoretically. The spatial coherence of the laser is controlled by the electro–optic crystal. The instantaneous spatial distribution of the dissipative force induced by the PSCL on an Rb atom is varying with time stochastically. The simulated results indicate that compared with a fully coherent laser, the spatial coherent laser has effects on the atomic trajectories; however, the capture velocity and the escape velocity are kept the same. The main reason is that the spatial coherence of the laser fluctuates temporally and spatially, but the average photon scattering rate varies little, which makes the total number of atoms and the atomic density distribution unchanged.