A quantum-enhanced magnetometer using a single high-spin nucleus in silicon

doi:10.1088/1674-1056/ad5a75

中国物理B ›› 2024, Vol. 33 ›› Issue (9): 90302-090302.doi: 10.1088/1674-1056/ad5a75

所属专题： SPECIAL TOPIC — Quantum computing and quantum sensing

A quantum-enhanced magnetometer using a single high-spin nucleus in silicon

Tao Xin(辛涛)^1,2,†, Ke Zhang(张科)^3,‡, and Jun Li(李俊)^4,5,1,§

1 Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
2 Guangdong Provincial Key Laboratory of Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
3 Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany;
4 Institute of Quantum Precision Measurement, State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen 518060, China;
5 College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

收稿日期:2024-04-07 修回日期:2024-06-17 接受日期:2024-06-21 发布日期:2024-09-11
通讯作者: Tao Xin, Ke Zhang, Jun Li E-mail:xint@sustech.edu.cn;kezhang@uni-mainz.de;lijunquantum@szu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 1212200199, 12122506, 12004165, 12275117, and 12204230), Guangdong Basic and Applied Basic Research Foundation (Grant Nos. 2021B1515020070 and 2022B1515020074), Guangdong Provincial Key Laboratory (Grant No. 2019B121203002), and Shen-zhen Science and Technology Program (Grant Nos. KQTD20200820113010023, RCBS20200714114820298, and RCYX20200714114522109).

A quantum-enhanced magnetometer using a single high-spin nucleus in silicon

Tao Xin(辛涛)^1,2,†, Ke Zhang(张科)^3,‡, and Jun Li(李俊)^4,5,1,§

1 Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
2 Guangdong Provincial Key Laboratory of Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
3 Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany;
4 Institute of Quantum Precision Measurement, State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen 518060, China;
5 College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

Received:2024-04-07 Revised:2024-06-17 Accepted:2024-06-21 Published:2024-09-11
Contact: Tao Xin, Ke Zhang, Jun Li E-mail:xint@sustech.edu.cn;kezhang@uni-mainz.de;lijunquantum@szu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 1212200199, 12122506, 12004165, 12275117, and 12204230), Guangdong Basic and Applied Basic Research Foundation (Grant Nos. 2021B1515020070 and 2022B1515020074), Guangdong Provincial Key Laboratory (Grant No. 2019B121203002), and Shen-zhen Science and Technology Program (Grant Nos. KQTD20200820113010023, RCBS20200714114820298, and RCYX20200714114522109).

摘要/Abstract

摘要： Quantum enhanced metrology has the potential to go beyond the standard quantum limit and eventually to the ultimate Heisenberg bound. In particular, quantum probes prepared in nonclassical coherent states have recently been recognized as a useful resource for metrology. Hence, there has been considerable interest in constructing magnetic quantum sensors that combine high resolution and high sensitivity. Here, we explore a nanoscale magnetometer with quantum-enhanced sensitivity, based on $^{123}$Sb ($I=7/2$) nuclear spin doped in silicon, that takes advantage of techniques of spin-squeezing and coherent control. With the optimal squeezed initial state, the magnetic field sensitivity may be expected to approach 6 aT$\cdot $Hz$^{-1/2}\cdot$cm$^{-3/2}$ and 603 nT$\cdot $Hz$^{-1/2}$ at the single-spin level. This magnetic sensor may provide a novel sensitive and high-resolution route to microscopic mapping of magnetic fields as well as other applications.

关键词: quantum magnetometer, silicon quantum qubit, nuclear electrical resonance

Abstract: Quantum enhanced metrology has the potential to go beyond the standard quantum limit and eventually to the ultimate Heisenberg bound. In particular, quantum probes prepared in nonclassical coherent states have recently been recognized as a useful resource for metrology. Hence, there has been considerable interest in constructing magnetic quantum sensors that combine high resolution and high sensitivity. Here, we explore a nanoscale magnetometer with quantum-enhanced sensitivity, based on $^{123}$Sb ($I=7/2$) nuclear spin doped in silicon, that takes advantage of techniques of spin-squeezing and coherent control. With the optimal squeezed initial state, the magnetic field sensitivity may be expected to approach 6 aT$\cdot $Hz$^{-1/2}\cdot$cm$^{-3/2}$ and 603 nT$\cdot $Hz$^{-1/2}$ at the single-spin level. This magnetic sensor may provide a novel sensitive and high-resolution route to microscopic mapping of magnetic fields as well as other applications.

Key words: quantum magnetometer, silicon quantum qubit, nuclear electrical resonance

中图分类号: (Quantum computation architectures and implementations)

03.67.Lx

03.67.-a (Quantum information) 42.50.Dv (Quantum state engineering and measurements)

Tao Xin(辛涛), Ke Zhang(张科), and Jun Li(李俊). A quantum-enhanced magnetometer using a single high-spin nucleus in silicon[J]. 中国物理B, 2024, 33(9): 90302-090302.

Tao Xin(辛涛), Ke Zhang(张科), and Jun Li(李俊). A quantum-enhanced magnetometer using a single high-spin nucleus in silicon[J]. Chin. Phys. B, 2024, 33(9): 90302-090302.

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A quantum-enhanced magnetometer using a single high-spin nucleus in silicon

A quantum-enhanced magnetometer using a single high-spin nucleus in silicon

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