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Researchers at the University of Geneva (UNIGE), working with Tehran’s Institute for Research in Fundamental Sciences (IPM), have shown theoretically that a new, ultrastrong quantum correlation is formed when three pairs of entangled photons are placed in a network. This discovery could one day be used to generate ultrasecure encryption keys.
In his 1964 theory of quantum nonlocality, John Stewart Bell showed that photon correlations are exclusively quantum in nature. The UNIGE team investigated the implications of Bell’s theory when it is applied to several pairs of photons that are placed in a network.
A quantum network with a triangular structure allows for a fundamentally novel type of quantum correlation….READ MORE