1. Chip-scale generation of 60-mode continuous-variable cluster states
- Author
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Wang, Ze, Li, Kangkang, Wang, Yue, Zhou, Xin, Cheng, Yinke, Jing, Boxuan, Sun, Fengxiao, Li, Jincheng, Li, Zhilin, Gong, Qihuang, He, Qiongyi, Li, Bei-Bei, and Yang, Qi-Fan
- Subjects
Physics - Optics ,Quantum Physics - 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.
- Published
- 2024