【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.Evapo
【机 构】
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State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shan
【出 处】
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Chinese Optics Letters
论文部分内容阅读
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 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.
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