Entanglement of nanophotonic quantum memory nodes in a telecom network

Distributing quantum entanglement between quantum memory nodes separated by extended distances1,4 is an important element for the realization of quantum networks, enabling potential applications ranging from quantum repeaters2,5 and long-distance secure communication6,7 to distributed quantum computing8,9 and distributed quantum sensing and metrology10,11. Proposed architectures require quantum nodes containing multiple long-lived qubits that can collect, store and process information communicated by photonic channels based on telecommunication (telecom) fibres or satellite-based links. In particular, the abilities to herald on successful photon arrival events and to detect quantum-gate errors are central to scalable implementations. As photons and individual matter qubits interact weakly in…

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