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Sympathetic electromagnetically induced transparency ground state cooling of a 40Ca+–27Al+ pair in an 27Al+ clock |
| Chenglong Sun(孙成龙)1,2,3, Kaifeng Cui(崔凯枫)1,2,†, Sijia Chao(晁思嘉)1,2, Yuanfei Wei(魏远飞)1,2,3, Jinbo Yuan(袁金波)1,2, Jian Cao(曹健)1,2, Hualin Shu(舒华林)1,2, and Xueren Huang(黄学人)1,2,4,‡ |
1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2 Key Laboratory of Atom Frequency Standards, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China;
4 Wuhan Institute of Quantum Technology, Wuhan 430206, China |
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Abstract We report on electromagnetically induced transparency cooling of 40Ca+ to sympathetically cool the three-dimensional secular modes of motion in a 40Ca+-27Al+ two-ion pair near the ground state. We observe simultaneous ground state cooling across all radial modes and axial modes of a 40Ca+-27Al+ ion pair, occupying a broader cooling range in frequency space over 3 MHz. The cooling time is observed to be less than 1 ms. The mean phonon number and heating rates of all motional modes are measured. This study is not only an important step for reducing the secular motion time-dilation shift uncertainty and uptime ratio of 27Al+ optical clock, but also essential for high-fidelity quantum simulations and quantum information processors using trapped ions.
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Received: 22 September 2022
Revised: 09 November 2022
Accepted manuscript online: 17 November 2022
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PACS:
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06.30.Ft
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(Time and frequency)
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37.10.Ty
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(Ion trapping)
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37.10.-x
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(Atom, molecule, and ion cooling methods)
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| Fund: Project supported by the National Key R&D Program of China (Grant No. 2017YFA0304401), the Technical Innovation Program of Hubei Province (Grant No. 2018AAA045), and the National Natural Science Foundation of China (Grant No. 11904387). |
Corresponding Authors:
Kaifeng Cui, Xueren Huang
E-mail: cuikaifeng@apm.ac.cn;hxueren@apm.ac.cn
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Cite this article:
Chenglong Sun(孙成龙), Kaifeng Cui(崔凯枫), Sijia Chao(晁思嘉), Yuanfei Wei(魏远飞), Jinbo Yuan(袁金波), Jian Cao(曹健), Hualin Shu(舒华林), and Xueren Huang(黄学人) Sympathetic electromagnetically induced transparency ground state cooling of a 40Ca+–27Al+ pair in an 27Al+ clock 2023 Chin. Phys. B 32 050601
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