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3 June 2022 Multicell atomic quantum memory as a hardware-efficient quantum repeater node
Chang LI
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Proceedings Volume PC12133, Quantum Technologies 2022; PC121330A (2022) https://doi.org/10.1117/12.2622398
Event: SPIE Photonics Europe, 2022, Strasbourg, France
Abstract
For scalable quantum communication and networks, a key step is to realize a quantum repeater node that can efficiently connect different segments of atom-photon entanglement using quantum memories. We report a compact and hardware-efficient realization of a quantum repeater node using a single atomic ensemble for multicell quantum memories. A millisecond lifetime is achieved for individual memory cells after suppressing the magnetic-field-induced inhomogeneous broadening and the atomic-motion-induced spin-wave dephasing. Based on these long-lived memory cells, we achieve heralded asynchronous entanglement generation in two quantum repeater segments one after another and then an on-demand entanglement connection of these two repeater segments. As another application of the multicell atomic quantum memory, we further demonstrate storage and on-demand retrieval of heralded atomic spin-wave qubits by implementing a random access quantum memory with individual addressing capacity. This work provides a promising constituent for efficient realization of quantum repeaters for large-scale quantum networks.
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Chang LI "Multicell atomic quantum memory as a hardware-efficient quantum repeater node", Proc. SPIE PC12133, Quantum Technologies 2022, PC121330A (3 June 2022); https://doi.org/10.1117/12.2622398
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KEYWORDS
Quantum memory
Quantum communications
Quantum efficiency
Quantum networks
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