Preparation of a two-state mixture of ultracold fermionic atoms with balanced population subject to the unstable magnetic field

doi:10.1088/1674-1056/abee6e

中国物理B ›› 2021, Vol. 30 ›› Issue (9): 90303-090303.doi: 10.1088/1674-1056/abee6e

Preparation of a two-state mixture of ultracold fermionic atoms with balanced population subject to the unstable magnetic field

Donghao Li(李东豪), Lianghui Huang(黄良辉)^†, Guoqi Bian(边国旗), Jie Miao(苗杰), Liangchao Chen(陈良超), Zengming Meng(孟增明), Wei Han(韩伟), and Pengjun Wang(王鹏军)

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:2020-12-24 修回日期:2021-02-13 接受日期:2021-03-15 出版日期:2021-08-19 发布日期:2021-08-19
通讯作者: Lianghui Huang E-mail:huanglh06@126.com
基金资助:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0301602 and 2018YFA0307601), the National Natural Science Foundation of China (Grant Nos. 12034011, 92065108, 11704234, 11804203, 11974224, 12022406, and 12004229), and the Fund for Shanxi “1331 Project” Key Subjects Construction.

Preparation of a two-state mixture of ultracold fermionic atoms with balanced population subject to the unstable magnetic field

Donghao Li(李东豪), Lianghui Huang(黄良辉)^†, Guoqi Bian(边国旗), Jie Miao(苗杰), Liangchao Chen(陈良超), Zengming Meng(孟增明), Wei Han(韩伟), and Pengjun Wang(王鹏军)

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:2020-12-24 Revised:2021-02-13 Accepted:2021-03-15 Online:2021-08-19 Published:2021-08-19
Contact: Lianghui Huang E-mail:huanglh06@126.com
Supported by:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0301602 and 2018YFA0307601), the National Natural Science Foundation of China (Grant Nos. 12034011, 92065108, 11704234, 11804203, 11974224, 12022406, and 12004229), and the Fund for Shanxi “1331 Project” Key Subjects Construction.

摘要/Abstract

摘要： We report a novel method to prepare a mixture of ⁴⁰K Fermi gas having an equal population of the two ground magnetic spin states confined in an optical dipole trap, in the presence of an noisy quantization (magnetic) field. We realize the equal population mixture by applying a series of RF pulses. We observe the dependence of the population distribution between two spin states on the number of the applied RF pulses and find that the decoherence effects leading to the population fluctuations are overcome by the high number of RF pules. Our demonstrated technique can be potentially used in the precision measurement experiments with ultracold gases in noisy environments.

关键词: Fermi gas, balanced mixture, RF-pulses, precision measurement

Abstract: We report a novel method to prepare a mixture of ⁴⁰K Fermi gas having an equal population of the two ground magnetic spin states confined in an optical dipole trap, in the presence of an noisy quantization (magnetic) field. We realize the equal population mixture by applying a series of RF pulses. We observe the dependence of the population distribution between two spin states on the number of the applied RF pulses and find that the decoherence effects leading to the population fluctuations are overcome by the high number of RF pules. Our demonstrated technique can be potentially used in the precision measurement experiments with ultracold gases in noisy environments.

Key words: Fermi gas, balanced mixture, RF-pulses, precision measurement

中图分类号: (Degenerate Fermi gases)

03.75.Ss

32.30.Bv (Radio-frequency, microwave, and infrared spectra) 03.65.Yz (Decoherence; open systems; quantum statistical methods)

Donghao Li(李东豪), Lianghui Huang(黄良辉), Guoqi Bian(边国旗), Jie Miao(苗杰), Liangchao Chen(陈良超), Zengming Meng(孟增明), Wei Han(韩伟), and Pengjun Wang(王鹏军). Preparation of a two-state mixture of ultracold fermionic atoms with balanced population subject to the unstable magnetic field[J]. 中国物理B, 2021, 30(9): 90303-090303.

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Preparation of a two-state mixture of ultracold fermionic atoms with balanced population subject to the unstable magnetic field

Preparation of a two-state mixture of ultracold fermionic atoms with balanced population subject to the unstable magnetic field

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