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 

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：《中国科学:物理学、力学、天文学英文版》 (Science China: Physics, Mechanics & Astronomy)

年 卷 期：2023年第66卷第9期

页      面：42-49页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0703[理学-化学] 0702[理学-物理学] 

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)。 

主　　题：ultracold atoms ultracold molecule STIRAP 

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=0at 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.