CAS Key Laboratory of Quantum Information, School of Physical Sciences, University of Science and Technology of China, Hefei, 230026, P. R. China.
CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, P. R. China.
Nat Commun. 2023 Mar 9;14(1):1288. doi: 10.1038/s41467-023-36929-8.
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 [Formula: see text], 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.
物体的精确射频 (RF) 测距和定位使包括自动驾驶、物联网和制造业在内的研究受益。量子接收器已被提议用于检测射频信号，其能力可以超越传统测量。作为最有前途的候选者之一，固态自旋显示出优异的鲁棒性、高空间分辨率和小型化。然而，来自于对高频 RF 信号的适度响应的挑战出现了。在这里，通过利用量子传感器和 RF 场之间的相干相互作用，我们展示了量子增强的射频检测和测距。基于纳米级量子传感和 RF 聚焦，RF 磁灵敏度提高了三个数量级，达到 21 [Formula: see text]。通过多光子激发进一步增强了自旋对目标位置的响应，使用 GHz RF 信号实现了 16 μm 的测距精度。这些结果为探索固态自旋的量子增强雷达和通信铺平了道路。
