Large-scale cluster quantum microcombs

Ze Wang; Kangkang Li; Yue Wang; Xin Zhou; Yinke Cheng; Boxuan Jing; Fengxiao Sun; Jincheng Li; Zhilin Li; Bingyan Wu; Qihuang Gong; Qiongyi He; Bei-Bei Li; Qi-Fan Yang

arXiv · 2406.10715

Large-scale cluster quantum microcombs

Ze Wang·Kangkang Li·Yue Wang·Xin Zhou·Yinke Cheng·Boxuan Jing·Fengxiao Sun·Jincheng Li·Zhilin Li·Bingyan Wu·Qihuang Gong·Qiongyi He·Bei-Bei Li·Qi-Fan Yang

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Abstract

An optical frequency comb comprises a cluster of equally spaced, phase-locked spectral lines. Replacing these classical components with correlated quantum light gives rise to cluster quantum frequency combs, providing abundant quantum resources for measurement-based quantum computation and multi-user quantum networks. We propose and generate cluster quantum microcombs within an on-chip optical microresonator driven by multi-frequency lasers. Through resonantly enhanced four-wave mixing processes, continuous-variable cluster states with 60 qumodes are deterministically created. The graph structures can be programmed into one- and two-dimensional lattices by adjusting the configurations of the pump lines, which are confirmed inseparable based on the measured covariance matrices. Our work demonstrates the largest-scale cluster states with unprecedented raw squeezing levels from a photonic chip, offering a compact and scalable platform for computational and communicational tasks with quantum advantages.

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Ze Wang, Kangkang Li, Yue Wang, Xin Zhou, Yinke Cheng, Boxuan Jing, Fengxiao Sun, Jincheng Li, Zhilin Li, Bingyan Wu, Qihuang Gong, Qiongyi He, Bei-Bei Li, Qi-Fan Yang. 2024-12-16. Large-scale cluster quantum microcombs. https://arxiv.org/abs/2406.10715

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