Nondestructive detection of atom counts in laser-trapped 171Yb atoms

doi:10.1088/1674-1056/ad9e9d

中国物理B ›› 2025, Vol. 34 ›› Issue (2): 23201-023201.doi: 10.1088/1674-1056/ad9e9d

Nondestructive detection of atom counts in laser-trapped ¹⁷¹Yb atoms

Congcong Tian(田聪聪)^1,2, Qiang Zhu(朱强)^1,†, Bing Wang(王兵)¹, Dezhi Xiong(熊德智)¹, Zhuanxian Xiong(熊转贤)¹, Lingxiang He(贺凌翔)^1,3,‡, and Baolong Lyu(吕宝龙)^1,3

1 Key Laboratory of Atomic Frequency Standards, 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 Hefei National Laboratory, Hefei 230088, China

收稿日期:2024-11-06 修回日期:2024-12-04 接受日期:2024-12-13 出版日期:2025-02-15 发布日期:2025-01-15
通讯作者: Qiang Zhu, Lingxiang He E-mail:zhuqiang@apm.ac.cn;helx@apm.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. U20A2075, 11803072, and 12374467), the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0300902), and the Hubei Provincial Science and Technology Major Project (Grant No. ZDZX2022000004).

Nondestructive detection of atom counts in laser-trapped ¹⁷¹Yb atoms

Congcong Tian(田聪聪)^1,2, Qiang Zhu(朱强)^1,†, Bing Wang(王兵)¹, Dezhi Xiong(熊德智)¹, Zhuanxian Xiong(熊转贤)¹, Lingxiang He(贺凌翔)^1,3,‡, and Baolong Lyu(吕宝龙)^1,3

1 Key Laboratory of Atomic Frequency Standards, 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 Hefei National Laboratory, Hefei 230088, China

Received:2024-11-06 Revised:2024-12-04 Accepted:2024-12-13 Online:2025-02-15 Published:2025-01-15
Contact: Qiang Zhu, Lingxiang He E-mail:zhuqiang@apm.ac.cn;helx@apm.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. U20A2075, 11803072, and 12374467), the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0300902), and the Hubei Provincial Science and Technology Major Project (Grant No. ZDZX2022000004).

摘要/Abstract

摘要： We present the experimental demonstration of nondestructive detection of $^{171}$Yb atoms in a magneto-optical trap (MOT) based on phase shift measurement induced by the atoms on a weak off-resonant laser beam. After loading a green MOT of $^{171}$Yb atoms, the phase shift is obtained with a two-color Mach-Zehnder interferometer by means of $\pm45$ MHz detuning with respect to the $^{1}$S$_{0}$-$^{1}$P$_{1}$ transition. We measured a phase shift of about 100 mrad corresponding to an atom count of around $5 \times 10^{5}$. This demonstrates that it is possible to obtain the number of atoms without direct destructive measurement compared with the absorption imaging method. This scheme could be an important approach towards a high-precision lattice clock for clock operation through suppression of the impact of the Dick effect.

关键词: ytterbium atoms, Mach-Zehnder interferometer, nondestructive detection, phase shift

Abstract: We present the experimental demonstration of nondestructive detection of $^{171}$Yb atoms in a magneto-optical trap (MOT) based on phase shift measurement induced by the atoms on a weak off-resonant laser beam. After loading a green MOT of $^{171}$Yb atoms, the phase shift is obtained with a two-color Mach-Zehnder interferometer by means of $\pm45$ MHz detuning with respect to the $^{1}$S$_{0}$-$^{1}$P$_{1}$ transition. We measured a phase shift of about 100 mrad corresponding to an atom count of around $5 \times 10^{5}$. This demonstrates that it is possible to obtain the number of atoms without direct destructive measurement compared with the absorption imaging method. This scheme could be an important approach towards a high-precision lattice clock for clock operation through suppression of the impact of the Dick effect.

Key words: ytterbium atoms, Mach-Zehnder interferometer, nondestructive detection, phase shift

中图分类号: (Coherent control of atomic interactions with photons)

32.80.Qk

37.10.De (Atom cooling methods) 07.60.Ly (Interferometers) 95.55.Sh (Auxiliary and recording instruments; clocks and frequency standards)

Congcong Tian(田聪聪), Qiang Zhu(朱强), Bing Wang(王兵), Dezhi Xiong(熊德智), Zhuanxian Xiong(熊转贤), Lingxiang He(贺凌翔), and Baolong Lyu(吕宝龙). Nondestructive detection of atom counts in laser-trapped ¹⁷¹Yb atoms[J]. 中国物理B, 2025, 34(2): 23201-023201.

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Nondestructive detection of atom counts in laser-trapped ¹⁷¹Yb atoms

Nondestructive detection of atom counts in laser-trapped ¹⁷¹Yb atoms

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