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A combined magnetic field stabilization system for improving the stability of 40Ca+ optical clock |
| Mengyan Zeng(曾孟彦)1,2,3,†, Zixiao Ma(马子晓)2,3,4,†, Ruming Hu(胡如明)2,3,4, Baolin Zhang(张宝林)2,3, Yanmei Hao(郝艳梅)2,3,4, Huaqing Zhang(张华青)2,3, Yao Huang(黄垚)2,3, Hua Guan(管桦)2,3,5,‡, and Kelin Gao(高克林)2,3,§ |
1 Huazhong University of Science and Technology, Wuhan 430074, China;
2 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;
3 Key Laboratory of Atomic Frequency Standards, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
4 University of Chinese Academy of Sciences, Beijing 100049, China;
5 Wuhan Institute of Quantum Technology, Wuhan 430206, China |
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Abstract Future applications of portable 40Ca+ optical clocks require reliable magnetic field stabilization to improve frequency stability, which can be achieved by implementing an active and passive magnetic field noise suppression system. On the one hand, we have optimized the magnetic shielding performance of the portable optical clock by reducing its apertures and optimizing its geometry; on the other hand, we have introduced an active magnetic field noise suppression system to further suppress the magnetic field noise experienced by the ions. These efforts reduced the ambient magnetic field noise by about 10000 times, significantly reduced the linewidth of the clock transition spectrum, improved the stability of the portable 40Ca+ optical clock, and created the conditions for using portable optical clocks in non-laboratory magnetic field environments. This active magnetic field suppression scheme has the advantages of simple installation and wide applicability.
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Received: 13 July 2023
Revised: 23 August 2023
Accepted manuscript online: 01 September 2023
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PACS:
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07.55.Nk
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(Magnetic shielding in instruments)
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95.55.Sh
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(Auxiliary and recording instruments; clocks and frequency standards)
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| Fund: This work is supported by the National Key R&D Program of China (Grant Nos. 2022YFB3904001, 2022YFB3904004, and 2018YFA0307500), the National Natural Science Foundation of China (Grant Nos. 12022414 and 12121004), the CAS Youth Innovation Promotion Association (Grant Nos. Y201963 and Y2022099), the Natural Science Foundation of Hubei Province (Grant No. 2022CFA013), the CAS Project for Young Scientists in Basic Research (Grant No. YSBR-055), and the Interdisciplinary Cultivation Project of the Innovation Academy for Precision Measurement of Science and Technology (Grant No. S21S2201). |
Corresponding Authors:
Hua Guan, Kelin Gao
E-mail: guanhua@apm.ac.cn;klgao@apm.ac.cn
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Cite this article:
Mengyan Zeng(曾孟彦), Zixiao Ma(马子晓), Ruming Hu(胡如明), Baolin Zhang(张宝林), Yanmei Hao(郝艳梅), Huaqing Zhang(张华青), Yao Huang(黄垚), Hua Guan(管桦), and Kelin Gao(高克林) A combined magnetic field stabilization system for improving the stability of 40Ca+ optical clock 2023 Chin. Phys. B 32 110704
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