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

辛涛 ¹张科 ²李俊³

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作者信息

1. Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China;Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China
2. Physikalisch-Technische Bundesanstalt,Bundesallee 100,38116 Braunschweig,Germany
3. Institute of Quantum Precision Measurement,State Key Laboratory of Radio Frequency Heterogeneous Integration,Shenzhen University,Shenzhen 518060,China;College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China
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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 123Sb(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.Hz-1/2.cm-3/2 and 603 nT.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

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基金项目

National Natural Science Foundation of China(1212200199)

National Natural Science Foundation of China(12122506)

National Natural Science Foundation of China(12004165)

National Natural Science Foundation of China(12275117)

National Natural Science Foundation of China(12204230)

Guangdong Basic and Applied Basic Research Foundation(2021B1515020070)

Guangdong Basic and Applied Basic Research Foundation(2022B1515020074)

Guangdong Provincial Key Laboratory(2019B121203002)

Shenzhen Science and Technology Program(KQTD20200820113010023)

Shenzhen Science and Technology Program(RCBS20200714114820298)

Shenzhen Science and Technology Program(RCYX20200714114522109)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

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