Multiparameter estimation with an array of entangled atomic sensors

Quantum enhanced multiparameter sensing is receiving great attention for its applications to vector sensing, imaging, sensor arrays, and clock networks. While for single parameter sensing, a clear theoretical framework has been developed, multiparameter sensing is surprisingly complex from a conceptual point of view. In this talk I will present our proof-of-principle experiment in multiparameter quantum enhanced sensing with a spatially separated array of entangled 87Rb atomic sensors. The production of these entangled sensors and flexible manipulation of the entanglement to optimize the sensor’s sensitivity will be described. Some of the conceptual questions regarding multiparameter sensing will also be addressed.