Large-scale cluster quantum microcombs
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.
Cite
@article{arxiv.2406.10715,
title = {Large-scale cluster quantum microcombs},
author = {Ze Wang and Kangkang Li and Yue Wang and Xin Zhou and Yinke Cheng and Boxuan Jing and Fengxiao Sun and Jincheng Li and Zhilin Li and Bingyan Wu and Qihuang Gong and Qiongyi He and Bei-Bei Li and Qi-Fan Yang},
journal= {arXiv preprint arXiv:2406.10715},
year = {2024}
}