Efficient production of ultracold polar molecules^(23)Na^(40)K in their absolute ground state via intermediate state of the coupled complex B^(1)Π|ν=4〉^(c)^(3)Σ^(+)|ν=25〉  

作　　者：Zi-Liang Li Zheng-Yu Gu Peng-Jun Wang Jing Zhang 

机构地区：[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

出　　处：《Science China(Physics,Mechanics & Astronomy)》2023年第9期42-49,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the Science and Technology Innovation 2030-Major Project(Grant No.2021ZD0302003);the National Key Research and Development Program of China(Grant Nos.2022YFA1404101,2021YFA1401700,and 2018YFA0307601);the National Natural Science Foundation of China(Grant Nos.12034011,92065108,11974224,12022406,and 12004229);the Fund for Shanxi 1331 Project Key Subjects Construction,and Tencent(Xplorer Prize)。

摘　　要：We report on the efficient creation of a sample of 2.2×10^(4)fermionic polar molecules^(23)Na^(40)K in their rovibrational ground state X^(1)∑^(+)|v=0,J=0>at 247 nK via an intermediate state of the spin-orbit coupled complex B^(1)Π|v=4〉~C^(3)∑^(+)|v=25〉.Compared with the intermediate state of the coupled complex B^(1)Π|v=12〉^(c)^(3)∑^(+)|v=35〉,this intermediate state has the larger Franck-Condon factors for up-and down-leg coupling of stimulated Raman adiabatic passage(STIRAP).We demonstrate this two-photon pathway to the^(23)Na^(40)K ground state molecules and find that the one-way STIRAP transfer efficiency reaches75%.The molecules^(23)Na^(40)K in their rovibrational ground state are an ideal candidate for the quantum simulation and quantum information of ultracold molecules with long-range interaction.

关 键 词：ultracold atoms ultracold molecule STIRAP 

分 类 号：O469[理学—凝聚态物理]