AI 中文总结
本文针对金刚石NV磁力计色散读出系统，分析其噪声与损耗源，提出采用探测微波场压缩态的方案，可在室温下提升器件性能。
AI 中文摘要
金刚石中的氮空位（NV）中心已成为各类传感器的优良敏感元件，尤其是基于金刚石杂质的磁力计发展迅速且已推向市场。然而，这类系统的光学读出会使系统设计复杂化。近期，研究人员提出了采用高精细度微波场介质腔对氮空位自旋态进行色散读出的方案，该方案无需使用光学读出。但目前仅针对这类器件的灵敏度做了基于散粒噪声的估算。本文对该系统各类实际相关的噪声与损耗源进行了详细分析，此外，还考虑了采用探测微波场的压缩量子态的可能性，结果表明该技术即使在室温下也能提升器件性能。
英文摘要
Nitrogen vacancy centers in diamond have established themselves as good sensing element for various type of sensors. In particular magnetometers based on diamond impurities are quickly developing and are already on the market. Yet, optical readout in these systems complicates system design. Recently schemes of dispersive readout of nitrogen vacancy spin state using high finesse dielectric cavities for microwave field were proposed, which do not use the optical readout scheme. However, only shot noise based estimates were so far done for sensitivity of these devices. Here we provide detailed analysis of various practically relevant noise and loss sources for such a system. Furthermore, we consider the possibility of using the squeezing quantum state of the probing microwave field and show it allows to improve the device performance even at room temperature.
DOI：10.1016/j.diamond.2026.114102
