论文标题
增强的量子感测和室温固态泥
Enhanced quantum sensing with room-temperature solid-state masers
论文作者
论文摘要
使用固态系统进行量子传感可在不同地区发现广泛的应用，从物质和生物医学科学到基本物理。已经开发了几种固态自旋传感器，从而促进了磁场和电场和温度等物理量的超敏感检测。利用非相互作用旋转的集体行为有望将检测限制提高到较低的水平，而迄今为止，由于线宽的扩大和固态旋转集合的效率低下，几乎无法达到这些水平。在这里，我们通过实验表明，在固态的室温下，新恢复的Maser技术可以克服此类缺点。由于MASER的作用，我们观察到分子自旋整体的不均匀宽阔线宽的降低4倍，这比在低温温度下从单旋转中测得的窄。基于MASER的读数应用于磁力测定法将单镜头的信号噪声比（SNR）为30 dB。该技术将是提高固态集合旋转传感器灵敏度的工具箱的重要补充。
Quantum sensing with solid-state systems finds broad applications in diverse areas ranging from material and biomedical sciences to fundamental physics. Several solid-state spin sensors have been developed, facilitating the ultra-sensitive detection of physical quantities such as magnetic and electric fields and temperature. Exploiting collective behaviour of non-interacting spins holds the promise of pushing the detection limit to even lower levels, while to date, those levels are scarcely reached due to the broadened linewidth and inefficient readout of solid-state spin ensembles. Here, we experimentally demonstrate that such drawbacks can be overcome by newly reborn maser technology at room temperature in the solid state. Owing to maser action, we observe a 4-fold reduction in the inhomogeneously broadened linewidth of a molecular spin ensemble, which is narrower than the same measured from single spins at cryogenic temperatures. The maser-based readout applied to magnetometry showcases a signal-to-noise ratio (SNR) of 30 dB for single shots. This technique would be a significant addition to the toolbox for boosting the sensitivity of solid-state ensemble spin sensors.
