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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2408.10994 |
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| _version_ | 1866911032641847296 |
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| author | Li, Yang Cai, Wen-Qi Ren, Ji-Gang Wang, Chao-Ze Yang, Meng Zhang, Liang Wu, Hui-Ying Chang, Liang Wu, Jin-Cai Jin, Biao Xue, Hua-Jian Li, Xue-Jiao Liu, Hui Yu, Guang-Wen Tao, Xue-Ying Chen, Ting Liu, Chong-Fei Luo, Wen-Bin Zhou, Jie Yong, Hai-Lin Li, Yu-Huai Li, Feng-Zhi Jiang, Cong Chen, Hao-Ze Wu, Chao Tong, Xin-Hai Xie, Si-Jiang Zhou, Fei Liu, Wei-Yue Liu, Nai-Le Li, Li Xu, Feihu Cao, Yuan Yin, Juan Shu, Rong Wang, Xiang-Bin Zhang, Qiang Wang, Jian-Yu Liao, Sheng-Kai Peng, Cheng-Zhi Pan, Jian-Wei |
| author_facet | Li, Yang Cai, Wen-Qi Ren, Ji-Gang Wang, Chao-Ze Yang, Meng Zhang, Liang Wu, Hui-Ying Chang, Liang Wu, Jin-Cai Jin, Biao Xue, Hua-Jian Li, Xue-Jiao Liu, Hui Yu, Guang-Wen Tao, Xue-Ying Chen, Ting Liu, Chong-Fei Luo, Wen-Bin Zhou, Jie Yong, Hai-Lin Li, Yu-Huai Li, Feng-Zhi Jiang, Cong Chen, Hao-Ze Wu, Chao Tong, Xin-Hai Xie, Si-Jiang Zhou, Fei Liu, Wei-Yue Liu, Nai-Le Li, Li Xu, Feihu Cao, Yuan Yin, Juan Shu, Rong Wang, Xiang-Bin Zhang, Qiang Wang, Jian-Yu Liao, Sheng-Kai Peng, Cheng-Zhi Pan, Jian-Wei |
| contents | A quantum network provides an infrastructure connecting quantum devices with revolutionary computing, sensing, and communication capabilities. As the best-known application of a quantum network, quantum key distribution (QKD) shares secure keys guaranteed by the laws of quantum mechanics. A quantum satellite constellation offers a solution to facilitate the quantum network on a global scale. The Micius satellite has verified the feasibility of satellite quantum communications, however, scaling up quantum satellite constellations is challenging, requiring small lightweight satellites, portable ground stations and real-time secure key exchange. Here we tackle these challenges and report the development of a quantum microsatellite capable of performing space-to-ground QKD using portable ground stations. The quantum microsatellite features a payload weighing approximately 23 kg, while the portable ground station weighs about 100 kg. These weights represent reductions by more than an order and two orders of magnitude, respectively, compared to the Micius satellite. Additionally, we multiplex bidirectional satellite-ground optical communication with quantum communication, enabling key distillation and secure communication in real-time. Using the microsatellite and the portable ground stations, we demonstrate satellite-based QKD with multiple ground stations and achieve the sharing of up to 0.59 million bits of secure keys during a single satellite pass. The compact quantum payload can be readily assembled on existing space stations or small satellites, paving the way for a satellite-constellation-based quantum and classical network for widespread real-life applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_10994 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Microsatellite-based real-time quantum key distribution Li, Yang Cai, Wen-Qi Ren, Ji-Gang Wang, Chao-Ze Yang, Meng Zhang, Liang Wu, Hui-Ying Chang, Liang Wu, Jin-Cai Jin, Biao Xue, Hua-Jian Li, Xue-Jiao Liu, Hui Yu, Guang-Wen Tao, Xue-Ying Chen, Ting Liu, Chong-Fei Luo, Wen-Bin Zhou, Jie Yong, Hai-Lin Li, Yu-Huai Li, Feng-Zhi Jiang, Cong Chen, Hao-Ze Wu, Chao Tong, Xin-Hai Xie, Si-Jiang Zhou, Fei Liu, Wei-Yue Liu, Nai-Le Li, Li Xu, Feihu Cao, Yuan Yin, Juan Shu, Rong Wang, Xiang-Bin Zhang, Qiang Wang, Jian-Yu Liao, Sheng-Kai Peng, Cheng-Zhi Pan, Jian-Wei Quantum Physics A quantum network provides an infrastructure connecting quantum devices with revolutionary computing, sensing, and communication capabilities. As the best-known application of a quantum network, quantum key distribution (QKD) shares secure keys guaranteed by the laws of quantum mechanics. A quantum satellite constellation offers a solution to facilitate the quantum network on a global scale. The Micius satellite has verified the feasibility of satellite quantum communications, however, scaling up quantum satellite constellations is challenging, requiring small lightweight satellites, portable ground stations and real-time secure key exchange. Here we tackle these challenges and report the development of a quantum microsatellite capable of performing space-to-ground QKD using portable ground stations. The quantum microsatellite features a payload weighing approximately 23 kg, while the portable ground station weighs about 100 kg. These weights represent reductions by more than an order and two orders of magnitude, respectively, compared to the Micius satellite. Additionally, we multiplex bidirectional satellite-ground optical communication with quantum communication, enabling key distillation and secure communication in real-time. Using the microsatellite and the portable ground stations, we demonstrate satellite-based QKD with multiple ground stations and achieve the sharing of up to 0.59 million bits of secure keys during a single satellite pass. The compact quantum payload can be readily assembled on existing space stations or small satellites, paving the way for a satellite-constellation-based quantum and classical network for widespread real-life applications. |
| title | Microsatellite-based real-time quantum key distribution |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2408.10994 |