Evaporative cooling rubidium atoms with microwave radiation  

作　　者：熊德智 王鹏军 陈海霞 张靖 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University

出　　处：《Chinese Optics Letters》2010年第4期351-353,共3页中国光学快报（英文版）

基　　金：supported in part by the National Natural Science Foundation of China for Distinguished Young Scholars(No.10725416);National Basic Research Program of China(No.2006CB921101);the National Natural Science Foundation of China for Excellent Research Team(No.60821004);the National Natural Science Foundation of China(No.60678029)

摘　　要：We report the experimental achievement of ^（87）Rb 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 ^（87）Rb atoms to transit from the ground-state hyperfine state ｜F=2,m_F= 2〉to ｜F=l,m_F=1〉.Compared with RF-induced evaporation,^（87）Rb atoms are hardly to achieve pure condensate by microwave evaporation cooling due to the effect of atoms in the ｜F=1,m_F=1〉state being pumped back into the trapping ｜F=2,m_F=1〉state.We report the experimental achievement of ^（87）Rb 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 ^（87）Rb atoms to transit from the ground-state hyperfine state ｜F=2,m_F= 2〉to ｜F=l,m_F=1〉.Compared with RF-induced evaporation,^（87）Rb atoms are hardly to achieve pure condensate by microwave evaporation cooling due to the effect of atoms in the ｜F=1,m_F=1〉state being pumped back into the trapping ｜F=2,m_F=1〉state.

关 键 词：BOSE Einstein condensation CONDENSATION COOLING EVAPORATION Evaporative cooling systems Microwaves Plasma confinement RUBIDIUM Statistical mechanics 

分 类 号：TN015[电子电信—物理电子学]