Zeeman decoherence effect of trapped 199Hg+ ion Ramsey spectra

doi:10.1088/1674-1056/ad7af6

中国物理B ›› 2024, Vol. 33 ›› Issue (11): 113702-113702.doi: 10.1088/1674-1056/ad7af6

Zeeman decoherence effect of trapped ¹⁹⁹Hg⁺ ion Ramsey spectra

Ge Liu(刘格)^1,2, Hao Liu(柳浩)^1,†, Yihe Chen(陈义和)¹, Jian Wang(王健)^1,2, Shuhong Huang(黄书泓)^1,2, Chengbin Li(李承斌)^1,3, and Lei She(佘磊)^1,‡

1 Key Laboratory of Atomic Frequency Standards (KLAFS), Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 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

收稿日期:2024-06-14 修回日期:2024-09-05 接受日期:2024-09-14 出版日期:2024-11-15 发布日期:2024-11-15
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2022YFB3904002).

Zeeman decoherence effect of trapped ¹⁹⁹Hg⁺ ion Ramsey spectra

Ge Liu(刘格)^1,2, Hao Liu(柳浩)^1,†, Yihe Chen(陈义和)¹, Jian Wang(王健)^1,2, Shuhong Huang(黄书泓)^1,2, Chengbin Li(李承斌)^1,3, and Lei She(佘磊)^1,‡

1 Key Laboratory of Atomic Frequency Standards (KLAFS), Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 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

Received:2024-06-14 Revised:2024-09-05 Accepted:2024-09-14 Online:2024-11-15 Published:2024-11-15
Contact: Hao Liu, Lei She E-mail:liuhao@apm.ac.cn;shelei@apm.ac.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2022YFB3904002).

摘要/Abstract

摘要： In the $^{199}$Hg$^{+}$ ion microwave clock, the Zeeman decoherence effect caused by the overlapping of Zeeman sidebands and the radial secular motion sidebands will decrease the contrast of the Ramsey fringe, thus reducing the signal-to-noise ratio of the spectra. In this paper, the Zeeman decoherence effect is analyzed theoretically and investigated experimentally. A simplified model is built to describe the Ramsey spectral probability, in which the transverse relaxation time $T_{{2}}$ is introduced to characterize the influence of the Zeeman decoherence effect phenomenologically. The experiments were carried out on a linear quadrupole trap $^{199}$Hg$^{+}$ ion clock. The results show that the probability model matches well with the experimental data, and the magnetic field value should be more than 150 mGs (1 Gs = 10$^{-4}$ T) to avoid the Zeeman decoherence effect.

关键词: $^{199}$Hg$^{+}$ ion microwave clock, Zeeman decoherence, transverse relaxation time

Abstract: In the $^{199}$Hg$^{+}$ ion microwave clock, the Zeeman decoherence effect caused by the overlapping of Zeeman sidebands and the radial secular motion sidebands will decrease the contrast of the Ramsey fringe, thus reducing the signal-to-noise ratio of the spectra. In this paper, the Zeeman decoherence effect is analyzed theoretically and investigated experimentally. A simplified model is built to describe the Ramsey spectral probability, in which the transverse relaxation time $T_{{2}}$ is introduced to characterize the influence of the Zeeman decoherence effect phenomenologically. The experiments were carried out on a linear quadrupole trap $^{199}$Hg$^{+}$ ion clock. The results show that the probability model matches well with the experimental data, and the magnetic field value should be more than 150 mGs (1 Gs = 10$^{-4}$ T) to avoid the Zeeman decoherence effect.

Key words: $^{199}$Hg$^{+}$ ion microwave clock, Zeeman decoherence, transverse relaxation time

中图分类号: (Ion trapping)

37.10.Ty

32.10.Fn (Fine and hyperfine structure) 32.30.-r (Atomic spectra?)

Ge Liu(刘格), Hao Liu(柳浩), Yihe Chen(陈义和), Jian Wang(王健), Shuhong Huang(黄书泓), Chengbin Li(李承斌), and Lei She(佘磊). Zeeman decoherence effect of trapped ¹⁹⁹Hg⁺ ion Ramsey spectra[J]. 中国物理B, 2024, 33(11): 113702-113702.

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Zeeman decoherence effect of trapped ¹⁹⁹Hg⁺ ion Ramsey spectra

Zeeman decoherence effect of trapped ¹⁹⁹Hg⁺ ion Ramsey spectra

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