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31 December 2022 Multiplexed quantum repeaters with absorptive quantum memories
Xiao Liu, Jun Hu, Zong-Feng Li, Xue Li, Pei-Yun Li, Peng-Jun Liang, Zong-Quan Zhou, Chuan-Feng Li, Guang-Can Guo
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Proceedings Volume PC12323, Quantum and Nonlinear Optics IX; PC123230A (2022) https://doi.org/10.1117/12.2651099
Event: SPIE/COS Photonics Asia, 2022, Online Only
Abstract
Due to the inevitable loss of single photon transmission in optical fiber, a quantum repeater scheme is needed to establish large-scale quantum networks. The existing elementary quantum repeater links are all based on emissive quantum memories, with entangled photons emitted by the memory itself. This architecture is difficult to support deterministic photon emission and multiplexing storage simultaneously, which fundamentally limits the rate of entanglement distribution. In this talk, I will present our recent work about the realization of heralded quantum entanglement between two absorptive quantum memories based on rare-earth-ion-doped crystals. This work confirmed the feasibility of constructing quantum repeater based on absorptive quantum memories and demonstrated the acceleration effect of multiplexing in quantum repeater for the first time, which lays a solid foundation for the construction of practical high-speed quantum networks.
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Xiao Liu, Jun Hu, Zong-Feng Li, Xue Li, Pei-Yun Li, Peng-Jun Liang, Zong-Quan Zhou, Chuan-Feng Li, and Guang-Can Guo "Multiplexed quantum repeaters with absorptive quantum memories", Proc. SPIE PC12323, Quantum and Nonlinear Optics IX, PC123230A (31 December 2022); https://doi.org/10.1117/12.2651099
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KEYWORDS
Quantum memory
Multiplexing
Solid state physics
Entangled states
Light sources
Photon polarization
Quantum efficiency
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