Quantum entanglement offers unprecedented precision for GPS, imaging and beyond

Science Daily  April 20, 2020
To date, almost all quantum-metrology demonstrations are restricted to improving the measurement performance at a single sensor. A team of researchers in the US (University of Arizona, industry) has demonstrated an entangled sensor network, empowered by continuous-variable (CV) multipartite entanglement, which is composed of three sensor nodes each equipped with an electro-optic transducer for the detection of radio-frequency (RF) signals. By properly tailoring the CV multipartite entangled states, the network can be reconfigured to maximize the quantum advantage in distributed RF sensing problems such as measuring the angle of arrival of an RF field. The research could open a new avenue for distributed quantum sensing and would lead to applications in ultrasensitive positioning, navigation, and timing…read more. TECHNICAL ARTICLE

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