Simultaneous temperature and magnetic field measurements using time-division multiplexing  

作　　者：林豪彬 冯策 董杨 江旺 高学栋 张少春 陈向东 孙方稳 Haobin Lin;Ce Feng;Yang Dong;Wang Jiang;Xuedong Gao;Shaochun Zhang;Xiangdong Chen;Fangwen Sun(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China;National Key Laboratory of ASIC,Hebei Semiconductor Research Institute,Shijiazhuang 050051,China)

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China [4]National Key Laboratory of ASIC,Hebei Semiconductor Research Institute,Shijiazhuang 050051,China

出　　处：《Chinese Optics Letters》2023年第1期59-63,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.12005218 and 52130510).

摘　　要：Nitrogen-vacancy color centers can perform highly sensitive and spatially resolved quantum measurements of physical quantities such as magnetic field,temperature,and pressure.Meanwhile,sensing so many variables at the same time often introduces additional noise,causing a reduced accuracy.Here,a dual-microwave time-division multiplexing protocol is used in conjunction with a lock-in amplifier in order to decouple temperature from the magnetic field and vice versa.In this protocol,dual-frequency driving and frequency modulation are used to measure the magnetic and temperature field simultaneously in real time.The sensitivity of our system is about 3.4 nT=√Hz p and 1.3 mK=√Hz p,respectively.Our detection protocol not only enables multifunctional quantum sensing,but also extends more practical applications.

关 键 词：quantum sensing temperature measurement magnetic field measurement 

分 类 号：O413[理学—理论物理] TP212[理学—物理]