Nanoscale covariance magnetometry with diamond quantum sensors
Nanoscale covariance magnetometry with diamond quantum sensors
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DOI：
10.1126/science.ade9858
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发表时间：
2022-09
期刊：
影响因子：
56.9
通讯作者：
Jared Rovny;Zhiyang Yuan;Mattias Fitzpatrick;A. Abdalla;Laura Futamura;C. Fox;M. Cambria;S. Kolkowitz;N. Leon
中科院分区：
文献类型：
--
作者：
Jared Rovny;Zhiyang Yuan;Mattias Fitzpatrick;A. Abdalla;Laura Futamura;C. Fox;M. Cambria;S. Kolkowitz;N. Leon
金刚石中的氮空位（NV）中心是一种原子级缺陷，可用于以高灵敏度和空间分辨率感测磁场。通常，通过对单个NV中心的连续测量进行平均，或者通过对许多NV中心的集合进行空间平均来测量磁场，这提供了不包含关于在空间或时间上分离的两个点之间的关系的非局部信息的平均值。在这里，我们提出并实现了一个传感模式，两个或更多的NV中心同时测量，我们提取的时间和空间的相关性，否则将无法访问的信号。我们演示了测量相关的应用噪声使用两个NV中心的自旋-电荷读出，并实现了一个光谱重建协议，用于解开本地和非本地噪声源。金刚石中的颜色缺陷中心，如氮空位中心效应，表现为微型指南针。它们的光学特征对局部磁场敏感，具有纳米级分辨率。到目前为止，这些传感方式在很大程度上限于检测静态磁场或感测整体平均值，仅间接提供对动态行为的访问。Rovny等人开发了一个理论框架，并展示了一种新的传感模式，用于从金刚石中两个氮空位缺陷中心的同时测量中检测时空相关性。协方差测量打开了一个窗口，通过纳米磁学感测时空动态。-ISO同时测量金刚石中的两个氮空位中心可以实现时空磁力测量。
Nitrogen vacancy (NV) centers in diamond are atom-scale defects that can be used to sense magnetic fields with high sensitivity and spatial resolution. Typically, the magnetic field is measured by averaging sequential measurements of single NV centers, or by spatial averaging over ensembles of many NV centers, which provides mean values that contain no nonlocal information about the relationship between two points separated in space or time. Here, we propose and implement a sensing modality whereby two or more NV centers are measured simultaneously, and we extract temporal and spatial correlations in their signals that would otherwise be inaccessible. We demonstrate measurements of correlated applied noise using spin-to-charge readout of two NV centers and implement a spectral reconstruction protocol for disentangling local and nonlocal noise sources. Description Covariance magnetometry Color defect centers in diamond, such as the nitrogen vacancy center effect, behave as miniature compass needles. Their optical signature is sensitive to local magnetic fields with nanoscale resolution. To date, these sensing modalities have been largely limited to detecting static magnetic fields or sensing an ensemble average, providing access to dynamical behavior only indirectly. Rovny et al. developed a theoretical framework and demonstrate a new sensing modality for detecting spatiotemporal correlations from simultaneous measurements of two nitrogen vacancy defect centers in diamond. Covariance measurements open a window for sensing spatiotemporal dynamics through nanoscale magnetometry. —ISO Simultaneous measurements of two nitrogen vacancy centers in diamond enables spatiotemporal magnetometry.