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Light-induced frequency shifts for the lowest vibrational levels of ultracold Cs2 in the molecular pure long-range \(0_g^-\) state

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Abstract

The light-induced frequency shift (LIFS) of ultracold molecular ro-vibrational levels originates from the strong coupling of the atomic-scattering state and the bound-molecular state. In this paper, we present our experimental determination of the LIFSs of the lowest vibrational levels (ν = 0, 1) in the purely long-range \(0_g^-\) state of ultracold cesium molecules. A high-resolution double photoassociation spectroscopy is developed, which serves as frequency ruler to measure the frequency shifts of the lowest molecular levels for Cs2. The experimental results are qualitatively consistent with the theoretical expectations.

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Acknowledgements

This work was supported by the National Key R&D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grants Nos. 61722507, 61675121, and 61705123), PCSIRT (No. IRT-17R70), 111 Project (Grant No. D18001), the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi (OIT), the Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province, and the Applied Basic Research Project of Shanxi Province, China (Grant Nos. 201701D221002, 201901D211191, and 201901D211188).

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Authors and Affiliations

  1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, 030006, China

    Ji-Zhou Wu, Yu-Qing Li, Wen-Liang Liu, Jie Ma, Lian-Tuan Xiao & Suo-Tang Jia

  2. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006, China

    Ji-Zhou Wu, Yu-Qing Li, Wen-Liang Liu, Jie Ma, Lian-Tuan Xiao & Suo-Tang Jia

  3. College of Physics and Electronic Engineering, Shanxi University, Taiyuan, 030006, China

    Jie Ma

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  1. Ji-Zhou Wu
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Wu, JZ., Li, YQ., Liu, WL. et al. Light-induced frequency shifts for the lowest vibrational levels of ultracold Cs2 in the molecular pure long-range \(0_g^-\) state. Front. Phys. 15, 22602 (2020). https://doi.org/10.1007/s11467-020-0951-y

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