Evaporative cooling rubidium atoms with microwave radiation
熊德智 Dezhi Xiong, 王鹏军 Pengjun Wang, 陈海霞 Haixia Chen +1 more
We report the experimental achievement of 87Rb Bose-Einstein condensation in a magnetic trap with microwave and radio frequency (RF) induced evaporation. Evaporative cooling is realized by using 6.8 GHz microwave radiation driving the 87Rb atoms to transit from the ground-state hyperfine state |F = 2,mF =2> to |F = 1,mF = 1>. Compared with RF-induced evaporation, 87Rb atoms are hardly to achieve pure condensate by microwave evaporation cooling due to the effect of atoms in the |F = 1,mF = 1> state being pumped back into the trapping |F = 2,mF = 1> state.
Chinese Optics Letters•Jan 1, 2010•4 citations