通过快速振荡驱动实现高频双通道锁相检测
High-frequency dual-channel lock-in detection via rapidly oscillating driving
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中文总结 AI 辅助
该研究提出高频交流信号双通道锁相检测通用协议，利用快速振荡驱动场调制高频目标信号，开发量子检测协议，给出基于金刚石氮空位中心的实施方案，能有效滤噪并提高信噪比，为高频弱信号抗噪检测提供新途径。
中文摘要 AI 辅助
我们提出了一种用于高频交流信号双通道锁相检测的通用协议。发现通过施加快速振荡驱动场可调制高频目标信号的影响。基于此机制，开发了用于高频信号的量子双通道锁相检测协议，扩展了量子传感的可及频率范围，还能同时估计信号幅度和初始相位。此外，给出基于金刚石中氮空位中心的可行实施方案。数值模拟表明该协议能有效滤除背景噪声，显著提高信噪比，为高频弱信号抗噪检测提供了有前景的方法。
英文摘要
Here we propose a general protocol for dual-channel lock-in detection of high-frequency ac signals. We find that the effect of a high-frequency target signal can be modulated through the application of rapidly oscillating driving fields. Based on this mechanism, we develop a quantum dual-channel lock-in detection protocol for high-frequency signals, which not only extends the accessible frequency range of quantum sensing but also enables the simultaneous estimation of the signal amplitude and initial phase. Furthermore, we present a feasible implementation scheme of the protocol based on nitrogen-vacancy centers in diamond. Numerical simulations demonstrate that the proposed protocol can effectively filter out background noise and significantly improve the signal-to-noise ratio. Our results provide a promising approach for realizing noise-resistant detection of weak signals in the high-frequency regime.
