Sympathetic electromagnetically induced transparency ground state cooling of a 40Ca+–27Al+ pair in an 27Al+ clock

doi:10.1088/1674-1056/aca39d

中国物理B ›› 2023, Vol. 32 ›› Issue (5): 50601-050601.doi: 10.1088/1674-1056/aca39d

Sympathetic electromagnetically induced transparency ground state cooling of a ⁴⁰Ca⁺–²⁷Al⁺ pair in an ²⁷Al⁺ clock

Chenglong Sun(孙成龙)^1,2,3, Kaifeng Cui(崔凯枫)^1,2,†, Sijia Chao(晁思嘉)^1,2, Yuanfei Wei(魏远飞)^1,2,3, Jinbo Yuan(袁金波)^1,2, Jian Cao(曹健)^1,2, Hualin Shu(舒华林)^1,2, and Xueren Huang(黄学人)^1,2,4,‡

1 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;
2 Key Laboratory of Atom Frequency Standards, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China;
4 Wuhan Institute of Quantum Technology, Wuhan 430206, China

收稿日期:2022-09-22 修回日期:2022-11-09 接受日期:2022-11-17 出版日期:2023-04-21 发布日期:2023-05-05
通讯作者: Kaifeng Cui, Xueren Huang E-mail:cuikaifeng@apm.ac.cn;hxueren@apm.ac.cn
基金资助:
Project supported by the National Key R&D Program of China (Grant No. 2017YFA0304401), the Technical Innovation Program of Hubei Province (Grant No. 2018AAA045), and the National Natural Science Foundation of China (Grant No. 11904387).

Sympathetic electromagnetically induced transparency ground state cooling of a ⁴⁰Ca⁺–²⁷Al⁺ pair in an ²⁷Al⁺ clock

1 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;
2 Key Laboratory of Atom Frequency Standards, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China;
4 Wuhan Institute of Quantum Technology, Wuhan 430206, China

Received:2022-09-22 Revised:2022-11-09 Accepted:2022-11-17 Online:2023-04-21 Published:2023-05-05
Contact: Kaifeng Cui, Xueren Huang E-mail:cuikaifeng@apm.ac.cn;hxueren@apm.ac.cn
Supported by:
Project supported by the National Key R&D Program of China (Grant No. 2017YFA0304401), the Technical Innovation Program of Hubei Province (Grant No. 2018AAA045), and the National Natural Science Foundation of China (Grant No. 11904387).

摘要/Abstract

摘要： We report on electromagnetically induced transparency cooling of ⁴⁰Ca⁺ to sympathetically cool the three-dimensional secular modes of motion in a ⁴⁰Ca⁺-²⁷Al⁺ two-ion pair near the ground state. We observe simultaneous ground state cooling across all radial modes and axial modes of a ⁴⁰Ca⁺-²⁷Al⁺ ion pair, occupying a broader cooling range in frequency space over 3 MHz. The cooling time is observed to be less than 1 ms. The mean phonon number and heating rates of all motional modes are measured. This study is not only an important step for reducing the secular motion time-dilation shift uncertainty and uptime ratio of ²⁷Al⁺ optical clock, but also essential for high-fidelity quantum simulations and quantum information processors using trapped ions.

关键词: sympathetic electromagnetically induced transparency cooling, trapped ions, motional ground state, ²⁷Al⁺ optical clock

Abstract: We report on electromagnetically induced transparency cooling of ⁴⁰Ca⁺ to sympathetically cool the three-dimensional secular modes of motion in a ⁴⁰Ca⁺-²⁷Al⁺ two-ion pair near the ground state. We observe simultaneous ground state cooling across all radial modes and axial modes of a ⁴⁰Ca⁺-²⁷Al⁺ ion pair, occupying a broader cooling range in frequency space over 3 MHz. The cooling time is observed to be less than 1 ms. The mean phonon number and heating rates of all motional modes are measured. This study is not only an important step for reducing the secular motion time-dilation shift uncertainty and uptime ratio of ²⁷Al⁺ optical clock, but also essential for high-fidelity quantum simulations and quantum information processors using trapped ions.

Key words: sympathetic electromagnetically induced transparency cooling, trapped ions, motional ground state, ²⁷Al⁺ optical clock

中图分类号: (Time and frequency)

06.30.Ft

37.10.Ty (Ion trapping) 37.10.-x (Atom, molecule, and ion cooling methods)

Chenglong Sun(孙成龙), Kaifeng Cui(崔凯枫), Sijia Chao(晁思嘉), Yuanfei Wei(魏远飞), Jinbo Yuan(袁金波), Jian Cao(曹健), Hualin Shu(舒华林), and Xueren Huang(黄学人). Sympathetic electromagnetically induced transparency ground state cooling of a ⁴⁰Ca⁺–²⁷Al⁺ pair in an ²⁷Al⁺ clock[J]. 中国物理B, 2023, 32(5): 50601-050601.

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Sympathetic electromagnetically induced transparency ground state cooling of a ⁴⁰Ca⁺–²⁷Al⁺ pair in an ²⁷Al⁺ clock

Sympathetic electromagnetically induced transparency ground state cooling of a ⁴⁰Ca⁺–²⁷Al⁺ pair in an ²⁷Al⁺ clock

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