Quantum enhanced radio detection and ranging with solid spins

Xiang-Dong Chen, En-Hui Wang, Long-Kun Shan, Shao-Chun Zhang, Ce Feng, Yu Zheng, Yang Dong, Guang-Can Guo and Fang-Wen Sun ()
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Xiang-Dong Chen: University of Science and Technology of China
En-Hui Wang: University of Science and Technology of China
Long-Kun Shan: University of Science and Technology of China
Shao-Chun Zhang: University of Science and Technology of China
Ce Feng: University of Science and Technology of China
Yu Zheng: University of Science and Technology of China
Yang Dong: University of Science and Technology of China
Guang-Can Guo: University of Science and Technology of China
Fang-Wen Sun: University of Science and Technology of China

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract The accurate radio frequency (RF) ranging and localizing of objects has benefited the researches including autonomous driving, the Internet of Things, and manufacturing. Quantum receivers have been proposed to detect the radio signal with ability that can outperform conventional measurement. As one of the most promising candidates, solid spin shows superior robustness, high spatial resolution and miniaturization. However, challenges arise from the moderate response to a high frequency RF signal. Here, by exploiting the coherent interaction between quantum sensor and RF field, we demonstrate quantum enhanced radio detection and ranging. The RF magnetic sensitivity is improved by three orders to 21 $${{{{{{{\rm{pT}}}}}}}}/\sqrt{{{{{{{{\rm{Hz}}}}}}}}}$$ pT / Hz , based on nanoscale quantum sensing and RF focusing. Further enhancing the response of spins to the target’s position through multi-photon excitation, a ranging accuracy of 16 μm is realized with a GHz RF signal. The results pave the way for exploring quantum enhanced radar and communications with solid spins.

Date: 2023
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DOI: 10.1038/s41467-023-36929-8

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