5-GHz chip-based quantum key distribution with 1Mbps secure key rate over 150 km
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866917334251208704 |
|---|---|
| author | Zhang, Guo-Wei Zheng, Sheng-Teng Xiao, You Wang, Fang-Xiang Ding, Wen-Jing Wang, Dianpeng Hao, Penglei Zhang, Li Chen, Jia-Lin Ding, Yu-Yang Wang, Shuang He, De-Yong Yin, Zhen-Qiang Zhou, Zheng Li, Hao You, Lixing Guo, Guang-Can Chen, Wei Han, Zheng-Fu |
| author_facet | Zhang, Guo-Wei Zheng, Sheng-Teng Xiao, You Wang, Fang-Xiang Ding, Wen-Jing Wang, Dianpeng Hao, Penglei Zhang, Li Chen, Jia-Lin Ding, Yu-Yang Wang, Shuang He, De-Yong Yin, Zhen-Qiang Zhou, Zheng Li, Hao You, Lixing Guo, Guang-Can Chen, Wei Han, Zheng-Fu |
| contents | Quantum key distribution (QKD) enables secure communication by harnessing the fundamental principles of quantum physics, which inherently guarantee information-theoretic security and intrinsic resistance to quantum computing attacks. However, the secure key rate of QKD typically decreases exponentially with increasing channel distance. In this work, by developing a novel polarization-state preparation method, an ultra-low time-jitter laser source and superconducting nanowire single-photon detectors, we demonstrate a 5-GHz integrated QKD system featuring ultra-low quantum bit error rates (QBERs). The system achieves secure key rates of 1.076 Mbps at 150 km and 105 kbps at 200 km over standard single-mode fiber channels, respectively. Our system substantially enhances the secure key rate, enabling high-resolution video calls with one-time-pad encryption over intercity backbone QKD links. This work represents a significant step forward in the development of high-performance practical QKD systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_24094 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | 5-GHz chip-based quantum key distribution with 1Mbps secure key rate over 150 km Zhang, Guo-Wei Zheng, Sheng-Teng Xiao, You Wang, Fang-Xiang Ding, Wen-Jing Wang, Dianpeng Hao, Penglei Zhang, Li Chen, Jia-Lin Ding, Yu-Yang Wang, Shuang He, De-Yong Yin, Zhen-Qiang Zhou, Zheng Li, Hao You, Lixing Guo, Guang-Can Chen, Wei Han, Zheng-Fu Quantum Physics Optics Quantum key distribution (QKD) enables secure communication by harnessing the fundamental principles of quantum physics, which inherently guarantee information-theoretic security and intrinsic resistance to quantum computing attacks. However, the secure key rate of QKD typically decreases exponentially with increasing channel distance. In this work, by developing a novel polarization-state preparation method, an ultra-low time-jitter laser source and superconducting nanowire single-photon detectors, we demonstrate a 5-GHz integrated QKD system featuring ultra-low quantum bit error rates (QBERs). The system achieves secure key rates of 1.076 Mbps at 150 km and 105 kbps at 200 km over standard single-mode fiber channels, respectively. Our system substantially enhances the secure key rate, enabling high-resolution video calls with one-time-pad encryption over intercity backbone QKD links. This work represents a significant step forward in the development of high-performance practical QKD systems. |
| title | 5-GHz chip-based quantum key distribution with 1Mbps secure key rate over 150 km |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2512.24094 |