中国物理B ›› 2015, Vol. 24 ›› Issue (8): 83701-083701.doi: 10.1088/1674-1056/24/8/083701
• ATOMIC AND MOLECULAR PHYSICS • 上一篇 下一篇
张宝武a b, 王兆英a, 孔德龙a, 林强a c
Zhang Bao-Wu (张宝武)a b, Wang Zhao-Ying (王兆英)a, Kong De-Long (孔德龙)a, Lin Qiang (林强)a c
摘要:
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.
中图分类号: (Atom cooling methods)