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Developing superior quantum sensing strategies ranging from ultra-highprecision measurement to complex structural analysis is at the heart of quantumtechnologies. While strategies using quantum resources, such as entanglementamong sensors, to enhance the sensing precision have been abundantlydemonstrated, the signal correlation among quantum sensors is rarely exploited.Here we develop a novel sensing paradigm exploiting the signal correlationamong multiple quantum sensors to resolve overlapping signals from multipletargets that individual sensors can't resolve and complex structuralconstruction struggles with. With three nitrogen-vacancy centers as a quantumelectrometer system, we demonstrate this multi-sensor paradigm by resolvingindividual defects' fluctuating electric fields from ensemble signals. We imagethe three-dimensional distribution of 16 dark electronic point-defects indiamond with accuracy approaching 1.7 nm via a GPS-like localization method.Furthermore, we obtain the real-time charge dynamics of individual pointdefects and visualize how the dynamics induce the well-known optical spectraldiffusion. The multi-sensor paradigm extends the quantum sensing toolbox andoffers new possibilities for structural analysis.

Correlated sensing with a solid-state quantum multi-sensor system for atomic-scale structural analysis