首页|Optimal preparation of Bose and Fermi atomic gas mixtures of 87Rb and 40K in a crossed optical dipole trap

Optimal preparation of Bose and Fermi atomic gas mixtures of 87Rb and 40K in a crossed optical dipole trap

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We report on the optimal production of the Bose and Fermi mixtures with 87Rb and 40K in a crossed optical dipole trap(ODT).We measure the atomic number and lifetime of the mixtures in combination of the spin state|F=9/2,mF=9/2>of 40Kand|1,1>of 87Rb in the ODT,which is larger and longer compared with the combination of the spin state|9/2,9/2>of 40K and|2,2>of 87Rb in the ODT.We observe the atomic numbers of 87Rb and 40K shown in each stage of the sympathetic cooling process while gradually reducing the depth of the optical trap.By optimizing the relative loading time of atomic mixtures in the MOT,we obtain the large atomic number of 40K(～6 × 106)or the mixtures of atoms with an equal number(～1.6 × 106)at the end of evaporative cooling in the ODT.We experimentally investigate the evaporative cooling in an enlarged volume of the ODT via adding a third laser beam to the crossed ODT and found that more atoms(8 × 106)and higher degeneracy(T/TF=0.25)of Fermi gases are obtained.The ultracold atomic gas mixtures pave the way to explore phenomena such as few-body collisions and the Bose-Fermi Hubbard model,as well as for creating ground-state molecules of87Rb40K.

optical dipole trapBose and Fermi gas mixturesatomic lifetime

丁培波、单标、赵宇航、杨雅婧、陈良超、孟增明、王鹏军、黄良辉

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State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-electronics,Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

Hefei National Laboratory,Hefei 230000,China

Innovation Program for Quantum Science and Technology国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家重点研发计划国家重点研发计划山西省"1331工程"重点建设项目

2021ZD030200312034011U23A600412374245123224099206510811974224120224062022YFA14041012021YFA1401700

2024

10.1088/1674-1056/ad334d

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(6)
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