Chip-scale generation of 60-mode continuous-variable cluster states

• URL: http://arxiv.org/abs/2406.10715v1
• Date: Sat, 15 Jun 2024 18:53:52 GMT
• Title: Chip-scale generation of 60-mode continuous-variable cluster states
• Authors: Ze Wang, Kangkang Li, Yue Wang, Xin Zhou, Yinke Cheng, Boxuan Jing, Fengxiao Sun, Jincheng Li, Zhilin Li, Qihuang Gong, Qiongyi He, Bei-Bei Li, Qi-Fan Yang,
• Abstract summary: We demonstrate 60-mode cluster states in a chip-based optical microresonator pumped by chromatic lasers. We realize one- and two-dimensional cluster states with up to 60 qumodes. Our work provides a compact and scalable platform for constructing large-scale entangled quantum resources.
• Score: 14.229258017996521
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Increasing the number of entangled entities is crucial for achieving exponential computational speedups and secure quantum networks. Despite recent progress in generating large-scale entanglement through continuous-variable (CV) cluster states, translating these technologies to photonic chips has been hindered by decoherence, limiting the number of entangled entities to 8. Here, we demonstrate 60-mode CVcluster states in a chip-based optical microresonator pumped by chromatic lasers. Resonantly-enhanced four-wave mixing processes establish entanglement between equidistant spectral quantum modes (qumodes), forming a quantum analogue of optical frequency combs. Decoherence is minimized to achieve unprecedented two-mode raw squeezing (>3 dB) from a chip. Using bichromatic and trichromatic pump lasers, we realize one- and two-dimensional cluster states with up to 60 qumodes. Our work provides a compact and scalable platform for constructing large-scale entangled quantum resources, which are appealing for performing computational and communicational tasks with quantum advantages.

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