Integrated spin-wave quantum memory

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外文摘要：Photonic integrated quantum memories are essential for the construction of scalable quantum networks.Spin-wave quantum storage,which can support on-demand retrieval with a long lifetime,is indispensable for practical applications,but has never been demonstrated in an integrated solid-state device.Here,we demonstrate spin-wave quantum storage based on a laser-written waveguide fabricated in a151 Eu3+:Y2SiO5 crystal,using both the atomic frequency comb and noiseless photon-echo protocols.Qubits encoded with single-photon-level inputs are stored and retrieved with a fidelity of 94.9％±1.2％,which is far beyond the maximal fidelity that can be obtained with any classical device.Our results underline the potential of laser-written integrated devices for practical applications in large-scale quantum networks,such as the construction of multiplexed quantum repeaters in an integrated configuration and high-density transportable quantum memories.

外文关键词：

quantum memoryintegrated opticsquantum networkquantum optics

作者：

Tian-Xiang Zhu、Ming-Xu Su、Chao Liu、Yu-Ping Liu、Chao-Fan Wang、Pei-Xi Liu、Yong-Jian Han、Zong-Quan Zhou、Chuan-Feng Li、Guang-Can Guo

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作者单位：

CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China

CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China

出版年：

2024

DOI：

10.1093/nsr/nwae161

国家科学评论(英文版)

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ISSN：

年,卷(期)：2024.11(11)

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