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Laser cooling with adiabatic passage for type-II transitions

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Abstract

We extend the idea of laser cooling with adiabatic passage to multi-level type-II transitions. We find the cooling force can be significantly enhanced when a proper magnetic field is applied. That is because the magnetic field decomposes the multi-level system into several two-level sub-systems, hence the stimulated absorption and stimulated emission can occur in order, allowing for the multiple photon momentum transfer. We show that this scheme also works on the laser-coolable molecules with a better cooling effect compared to the conventional Doppler cooling. A reduced dependence on spontaneous emission based on our scheme is observed as well. Our results suggest this scheme is very feasible for laser cooling of polar molecules.

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Acknowledgements

We acknowledge the support from the Natural Science Foundation of Zhejiang Province under Grant No. LZ18A040001, the National Key R&D Program of China under Grant No. 2018YFA0307200, the National Natural Science Foundation of China under Grant No. 12074337, Zhejiang Province Plan for Science and Technology No. 2020C01019, and the Fundamental Research Funds for the Central Universities.

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Authors and Affiliations

  1. Interdisciplinary Center of Quantum Information, State Key Laboratory of Modern Optical Instrumentation, Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou, 310027, China

    Qian Liang, Tao Chen, Wen-Hao Bu, Yu-He Zhang & Bo Yan

  2. Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, China

    Bo Yan

  3. Key Laboratory of Quantum Optics, Chinese Academy of Sciences, Shanghai, 200800, China

    Bo Yan

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  1. Qian Liang
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  2. Tao Chen
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  3. Wen-Hao Bu
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  5. Bo Yan
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Correspondence to Tao Chen or Bo Yan.

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This article can also be found at http://journal.hep.com.cn/fop/EN/10.1007/s11467-020-1019-8.

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Liang, Q., Chen, T., Bu, WH. et al. Laser cooling with adiabatic passage for type-II transitions. Front. Phys. 16, 32501 (2021). https://doi.org/10.1007/s11467-020-1019-8

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