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arXiv · 2410.18516

Integrated spectrally multiplexed light-matter interface at telecom band

Xueying Zhang·Bin Zhang·Shihai Wei·Hao Li·Jinyu Liao·Tao Zhou·Guangwei Deng·You Wang·Haizhi Song·Lixing You·Boyu Fan·Yunru Fan·Feng Chen·Guangcan Guo·Qiang Zhou
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Abstract

Light-matter interface is an important building block for long-distance quantum networks. Towards a scalable quantum network with high-rate quantum information processing, it requires to develop integrated light-matter interfaces with broadband and multiplexing capacities. Here we demonstrate a light-matter interface at telecom band in an integrated system. A five-spectral-channel atomic-frequency-comb photonic memory is prepared on a laser-written Er3+:LiNbO3 chip. The bandwidth of each channel is 4 GHz with a channel spacing of 15 GHz. The signal photons from time-bin entangled photon pairs at telecom band are sent into the on-chip memory and recalled after a storage time of 152 ns. The entanglement-preserving nature of our integrated quantum interface is assessed by an input/output fidelity of >92% for all the five spectral channels. Our light-matter interfaces constitute a notable step forward toward a high-rate quantum network involving integrated device.

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Xueying Zhang, Bin Zhang, Shihai Wei, Hao Li, Jinyu Liao, Tao Zhou, Guangwei Deng, You Wang, Haizhi Song, Lixing You, Boyu Fan, Yunru Fan, Feng Chen, Guangcan Guo, Qiang Zhou. 2024-10-24. Integrated spectrally multiplexed light-matter interface at telecom band. https://arxiv.org/abs/2410.18516

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