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

作     者：李东豪 黄良辉 边国旗 苗杰 陈良超 孟增明 韩伟 王鹏军 Donghao Li;Lianghui Huang;Guoqi Bian;Jie Miao;Liangchao Chen;Zengming Meng;Wei Han;Pengjun Wang

作者机构：State Key Laboratory of Quantum Optics and Quantum Optics DevicesInstitute of Opto-electronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第9期

页      面：107-110页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 070202[理学-粒子物理与原子核物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：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) the Fund for Shanxi“1331 Project”Key Subjects Construction. 

主　　题：Fermi gas balanced mixture RF-pulses precision measurement 

摘      要：We report a novel method to prepare a mixture of ^(40)K 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.