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Compact dual MOT apparatus of K and Rb for optical tweezer experiment |
| Kedi Wei(魏可迪), Yangbo Wei(韦样波), Shangjin Li(李上进), and Bo Yan(颜波)† |
| School of Physics, Zhejiang University, Hangzhou 310027, China |
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Abstract The optical tweezer experiment with neutral atoms is widely used for quantum information research. Here, we present a compact dual magneto-optical trap (MOT) setup for a two-species optical tweezer. Rubidium (Rb) atoms are directly captured using a vapor MOT, while potassium (K) atoms are collected via a 2-stage MOT. Both the quadratic and gradient magnetic fields required for the MOT and Zeeman slower are created by permanent magnets. With the help of the Zeeman slower, the K MOT loading efficiency is enhanced by a factor of three. After the MOT stage, we apply D$_1$ gray molasses to reduce the temperature of the K atoms to 9 μK. Using this apparatus, both Rb and K are loaded into the optical tweezer.
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Received: 04 May 2025
Revised: 21 June 2025
Accepted manuscript online: 27 June 2025
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PACS:
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37.10.-x
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(Atom, molecule, and ion cooling methods)
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37.10.De
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(Atom cooling methods)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant Nos. 2023YFA1406703 and 2022YFA1404203), the National Natural Science Foundation of China (Grant Nos. 12425408, U21A20437 and 12074337), the Natural Science Foundation of Zhejiang Province, China (Grant No. LR21A040002), and the Fundamental Research Funds for the Central Universities (Grant No. 226-2023-00131). |
Corresponding Authors:
Bo Yan
E-mail: yanbohang@zju.edu.cn
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Cite this article:
Kedi Wei(魏可迪), Yangbo Wei(韦样波), Shangjin Li(李上进), and Bo Yan(颜波) Compact dual MOT apparatus of K and Rb for optical tweezer experiment 2026 Chin. Phys. B 35 013701
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