Achieving ultracold Bose–Fermi mixture of^(87)Rb and^(40)K with dual dark magnetic-optical-trap  

作　　者：Jie Miao Guoqi Bian Biao Shan Liangchao Chen Zengming Meng Pengjun Wang Lianghui Huang Jing Zhang 苗杰;边国旗;单标;陈良超;孟增明;王鹏军;黄良辉;张靖(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-electronics,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-electronics,Shanxi University,Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Chinese Physics B》2022年第8期252-257,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12034011,92065108,11974224,12022406,and 12004229);the National Key Research and Development Program of China(Grant No.2018YFA0307601);the Fund for Shanxi 1331 Project Key Subjects Construction;the Program of Youth Sanjin Scholar。

摘　　要：We demonstrate that dual dark magnetic-optical-traps(MOTs)have great importance in the two-species^(87)Rb and^(40)K mixture compared with dual bright MOTs.The dark MOT has a little improvement in the trapping of single-species^(87)Rb or^(40)K gases compared with bright MOT.For the case of loading two-species^(87)Rb and^(40)K simultaneously,the improvement of^(40)K in the dual dark MOTs is mainly from the reduction of light-assisted collision losses.The dual dark MOTs employ a pair of conical lenses to produce the hollow beam for repump laser with high efficiency.The number and density of^(87)Rb and^(40)K atoms after evaporative cooling in the hybrid magnetic trap with dark MOT loading are compared with those in bright MOT.The atoms with large number and high density make it easier to realize the quantum degenerate of Bose-Fermi mixture.

关 键 词：Bose–Fermi mixture dark magnetic-optical-trap(MOT) Fermi gas hollow beam 

分 类 号：O469[理学—凝聚态物理]