Multilevel atomic Ramsey interferometry for precise parameter estimations

doi:10.1088/1674-1056/ac0527

中国物理B ›› 2021, Vol. 30 ›› Issue (12): 120601-120601.doi: 10.1088/1674-1056/ac0527

Multilevel atomic Ramsey interferometry for precise parameter estimations

X N Feng(冯夏宁)^1,2,† and L F Wei(韦联福)^2,‡

1 Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing & School of Physics and Astronomy, Sun Yat-Sen University(Zhuhai Campus), Zhuhai 519082, China;
2 Information Quantum Technology Laboratory, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

收稿日期:2021-01-26 修回日期:2021-04-24 接受日期:2021-05-26 出版日期:2021-11-15 发布日期:2021-11-15
通讯作者: X N Feng, L F Wei E-mail:fengxianing@163.com;lfwei@swjtu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11974290).

Multilevel atomic Ramsey interferometry for precise parameter estimations

X N Feng(冯夏宁)^1,2,† and L F Wei(韦联福)^2,‡

1 Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing & School of Physics and Astronomy, Sun Yat-Sen University(Zhuhai Campus), Zhuhai 519082, China;
2 Information Quantum Technology Laboratory, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

Received:2021-01-26 Revised:2021-04-24 Accepted:2021-05-26 Online:2021-11-15 Published:2021-11-15
Contact: X N Feng, L F Wei E-mail:fengxianing@163.com;lfwei@swjtu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11974290).

摘要/Abstract

摘要： Multi-path (or multi-mode) entanglement has been proved to be a useful resource for sub-shot-noise sensitivity of phase estimation, which has aroused much research interest in quantum metrology recently. Various schemes of multi-path interferometers based on optical systems have been put forward. Here, we study a multi-state interferometer with multi-level atoms by projective measurements. Specifically, we investigate its ultimate sensitivity described by quantum Fisher information theory and find that the Cramer-Rao bound can be achieved. In particular, we investigate a specific scheme to improve the sensitivity of magnetometery with a three-state interferometry delivered by a single nitrogen-vacancy (NV) center of diamond with tailor pulses. The impacts of imperfections of the atomic beam-splitter, described by the three-level quantum Fourier transform, on the sensitivity of phase estimation is also discussed.

关键词: quantum metrology, multi-path interferometers, quantum measurement

Abstract: Multi-path (or multi-mode) entanglement has been proved to be a useful resource for sub-shot-noise sensitivity of phase estimation, which has aroused much research interest in quantum metrology recently. Various schemes of multi-path interferometers based on optical systems have been put forward. Here, we study a multi-state interferometer with multi-level atoms by projective measurements. Specifically, we investigate its ultimate sensitivity described by quantum Fisher information theory and find that the Cramer-Rao bound can be achieved. In particular, we investigate a specific scheme to improve the sensitivity of magnetometery with a three-state interferometry delivered by a single nitrogen-vacancy (NV) center of diamond with tailor pulses. The impacts of imperfections of the atomic beam-splitter, described by the three-level quantum Fourier transform, on the sensitivity of phase estimation is also discussed.

Key words: quantum metrology, multi-path interferometers, quantum measurement

中图分类号: (Metrology)

06.20.-f

06.20.Dk (Measurement and error theory) 03.75.Dg (Atom and neutron interferometry)

X N Feng(冯夏宁) and L F Wei(韦联福). Multilevel atomic Ramsey interferometry for precise parameter estimations[J]. 中国物理B, 2021, 30(12): 120601-120601.

X N Feng(冯夏宁) and L F Wei(韦联福). Multilevel atomic Ramsey interferometry for precise parameter estimations[J]. Chin. Phys. B, 2021, 30(12): 120601-120601.

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Multilevel atomic Ramsey interferometry for precise parameter estimations

Multilevel atomic Ramsey interferometry for precise parameter estimations

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