Room-temperature waveguide integrated quantum register in a semiconductor photonic platform
Quantum photonic integrated circuits are reshaping quantum networks and sensing by providing compact, efficient platforms for practical quantum applications. Despite continuous breakthroughs, integrating entangled registers into photonic devices on a CMOS-compatible platform presents significant challenges. Herein, we present single electron-nuclear spin entanglement and its integration into a silicon-carbide-on-insulator (SiCOI) waveguide. We demonstrate the successful generation of single divacancy electron spins and near-unity spin initialization of single <sup>13</sup>C nuclear spins. Both single nuclear and electron spin can be coherently controlled and a maximally entangled state with a fidelity of 0.89 has been prepared under ambient conditions. Based on the nanoscale positioning techniques, the entangled quantum register has been further integrated into SiC photonic waveguides for the first time. We find that the intrinsic optical and spin characteristics of the register are well preserved and the fidelity of the entangled state remains as high as 0.88. Our findings highlight the promising prospects of the SiCOI platform as a compelling candidate for future scalable quantum photonic applications.
Authors
- Zhengtong Liu (ORCID: https://orcid.org/0009-0004-3733-0190)
- Haibo Hu (ORCID: https://orcid.org/0000-0001-7494-1469)
- Dawei Lu (ORCID: https://orcid.org/0000-0003-0462-7225)
- Qinghai Song (ORCID: https://orcid.org/0000-0003-1048-411X)
- Shumin Xiao (ORCID: https://orcid.org/0000-0002-0751-9556)
- Xin Ou (ORCID: https://orcid.org/0000-0002-0316-9958)
- Yu Zhou (ORCID: https://orcid.org/0000-0002-9810-5307)
- Ailun Yi (ORCID: https://orcid.org/0000-0002-8244-8866)
- Zi Wang (ORCID: https://orcid.org/0009-0006-2717-5750)
- Qiang Li (ORCID: https://orcid.org/0000-0003-1056-4152)
- Yao Zhang (ORCID: https://orcid.org/0000-0002-6080-9456)
- Qi Luo (ORCID: https://orcid.org/0009-0003-0931-8314)
- Chengying Liu (ORCID: https://orcid.org/0009-0009-3138-7029)
- Tongyuan Bao
Institutions
- Shanxi University (CN)
- Chinese Academy of Sciences (CN)
- Harbin Institute of Technology (CN)
- Southern University of Science and Technology (CN)
- Shenzhen Bay Laboratory (CN)
- Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality (CN)
- Peng Cheng Laboratory (CN)
- Shanghai Institute of Microsystem and Information Technology (CN)
- University of Chinese Academy of Sciences (CN)
- Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area (CN)
- Zhejiang University (CN)
- Ministry of Industry and Information Technology (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-11-26
- DOI
- https://doi.org/10.1038/s41467-024-54606-2
- Citations
- 10
- Primary Topic
- Diamond and Carbon-based Materials Research
- Type
- article
- Field-Weighted Citation Impact
- 1.17
Funders
- National Natural Science Foundation of China
- Basic and Applied Basic Research Foundation of Guangdong Province