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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 |
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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.
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Received: 06 November 2024
Revised: 04 December 2024
Accepted manuscript online: 13 December 2024
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PACS:
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32.80.Qk
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(Coherent control of atomic interactions with photons)
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37.10.De
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(Atom cooling methods)
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07.60.Ly
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(Interferometers)
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95.55.Sh
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(Auxiliary and recording instruments; clocks and frequency standards)
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| Fund: 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). |
Corresponding Authors:
Qiang Zhu, Lingxiang He
E-mail: zhuqiang@apm.ac.cn;helx@apm.ac.cn
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Cite this article:
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 2025 Chin. Phys. B 34 023201
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