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Achieving ultracold Bose-Fermi mixture of 87Rb and 40K with dual dark magnetic-optical-trap |
| Jie Miao(苗杰)1,2, Guoqi Bian(边国旗)1,2, Biao Shan(单标)1,2, Liangchao Chen(陈良超)1,2, Zengming Meng(孟增明)1,2, Pengjun Wang(王鹏军)1,2, Lianghui Huang(黄良辉)1,2,†, and Jing Zhang(张靖)1,2,‡ |
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 |
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Abstract We demonstrate that dual dark magnetic-optical-traps (MOTs) have great importance in the two-species 87Rb and 40K mixture compared with dual bright MOTs. The dark MOT has a little improvement in the trapping of single-species 87Rb or 40K gases compared with bright MOT. For the case of loading two-species 87Rb and 40K simultaneously, the improvement of 40K 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 87Rb and 40K 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.
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Received: 21 January 2022
Revised: 21 February 2022
Accepted manuscript online: 25 February 2022
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PACS:
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03.75.Ss
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(Degenerate Fermi gases)
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37.10.De
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(Atom cooling methods)
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34.50.Cx
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(Elastic; ultracold collisions)
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67.85.Pq
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(Mixtures of Bose and Fermi gases)
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| Fund: 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, and the Program of Youth Sanjin Scholar. |
Corresponding Authors:
Lianghui Huang, Jing Zhang
E-mail: huanglh06@126.com;jzhang74@yahoo.com, jzhang74@sxu.edu.cn
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Cite this article:
Jie Miao(苗杰), Guoqi Bian(边国旗), Biao Shan(单标), Liangchao Chen(陈良超), Zengming Meng(孟增明), Pengjun Wang(王鹏军), Lianghui Huang(黄良辉), and Jing Zhang(张靖) Achieving ultracold Bose-Fermi mixture of 87Rb and 40K with dual dark magnetic-optical-trap 2022 Chin. Phys. B 31 080306
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