Experimental entanglement of 25 individually accessible atomic quantum interfaces

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Abstract

A quantum interface links the stationary qubits in a quantum memory with flying photonic qubits in optical transmission channels and constitutes a critical element for the future quantum internet. Entanglement of quantum interfaces is an important step for the realization of quantum networks. Through heralded detection of photon interference, we generate multipartite entanglement between 25 (or 9) individually addressable quantum interfaces in a multiplexed atomic quantum memory array and confirm genuine 22-partite (or 9-partite) entanglement. This experimental entanglement of a record-high number of individually addressable quantum interfaces makes an important step toward the realization of quantum networks, long-distance quantum communication, and multipartite quantum information processing.

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Pu, Y., Wu, Y., Jiang, N., Chang, W., Li, C., Zhang, S., & Duan, L. (2018). Experimental entanglement of 25 individually accessible atomic quantum interfaces. Science Advances, 4(4). https://doi.org/10.1126/sciadv.aar3931

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