Large-scale cluster quantum microcombs
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.
Authors
- Xin Zhou (ORCID: https://orcid.org/0000-0002-4385-8379)
- Qi‐Fan Yang (ORCID: https://orcid.org/0000-0002-7036-1712)
- Qiongyi He (ORCID: https://orcid.org/0000-0002-2408-4320)
- Feng-Xiao Sun (ORCID: https://orcid.org/0000-0002-5454-413X)
- Qihuang Gong (ORCID: https://orcid.org/0000-0003-4974-6244)
- Jincheng Li (ORCID: https://orcid.org/0009-0001-0410-3432)
- Bei‐Bei Li (ORCID: https://orcid.org/0000-0002-9259-244X)
- Ze Wang (ORCID: https://orcid.org/0009-0009-4281-7557)
- Yue Wang (ORCID: https://orcid.org/0000-0003-1364-9055)
- Zhilin Li (ORCID: https://orcid.org/0000-0002-1636-5376)
- Bo Wu (ORCID: https://orcid.org/0000-0003-0695-019X)
- Kangkang Li (ORCID: https://orcid.org/0000-0003-4796-1549)
- Y. H. Cheng
- Boxuan Jing
Institutions
- Shanxi University (CN)
- Chinese Academy of Sciences (CN)
- Nantong University (CN)
- Peking University (CN)
- Hefei University (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Institute of Physics (CN)
- State Key Laboratory of Artificial Microstructure and Mesoscopic Physics
Publication Details
- Journal
- Light Science & Applications
- Published
- 2025-04-16
- DOI
- https://doi.org/10.1038/s41377-025-01812-2
- Citations
- 17
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 21.19
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Beijing Municipality
- Peking University