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

doi:10.1088/1674-1056/ac5882

中国物理B ›› 2022, Vol. 31 ›› Issue (8): 80306-080306.doi: 10.1088/1674-1056/ac5882

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

收稿日期:2022-01-21 修回日期:2022-02-21 接受日期:2022-02-25 出版日期:2022-07-18 发布日期:2022-07-23
通讯作者: Lianghui Huang, Jing Zhang E-mail:huanglh06@126.com;jzhang74@yahoo.com, jzhang74@sxu.edu.cn
基金资助:
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.

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

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

Received:2022-01-21 Revised:2022-02-21 Accepted:2022-02-25 Online:2022-07-18 Published:2022-07-23
Contact: Lianghui Huang, Jing Zhang E-mail:huanglh06@126.com;jzhang74@yahoo.com, jzhang74@sxu.edu.cn
Supported by:
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.

摘要/Abstract

摘要： 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.

关键词: Bose-Fermi mixture, dark magnetic-optical-trap (MOT), Fermi gas, hollow beam

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.

Key words: Bose-Fermi mixture, dark magnetic-optical-trap (MOT), Fermi gas, hollow beam

中图分类号: (Degenerate Fermi gases)

03.75.Ss

37.10.De (Atom cooling methods) 34.50.Cx (Elastic; ultracold collisions) 67.85.Pq (Mixtures of Bose and Fermi gases)

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[J]. 中国物理B, 2022, 31(8): 80306-080306.

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

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

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