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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2403.11441 |
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| _version_ | 1866914925261094912 |
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| author | Jing, Xu Qian, Cheng Weng, Chen-Xun Li, Bing-Hong Chen, Zhe Wang, Chen-Quan Tang, Jie Gu, Xiao-Wen Kong, Yue-Chan Chen, Tang-Sheng Yin, Hua-Lei Jiang, Dong Niu, Bin Lu, Liang-Liang |
| author_facet | Jing, Xu Qian, Cheng Weng, Chen-Xun Li, Bing-Hong Chen, Zhe Wang, Chen-Quan Tang, Jie Gu, Xiao-Wen Kong, Yue-Chan Chen, Tang-Sheng Yin, Hua-Lei Jiang, Dong Niu, Bin Lu, Liang-Liang |
| contents | Quantum communication networks are crucial for both secure communication and cryptographic networked tasks. Building quantum communication networks in a scalable and cost-effective way is essential for their widespread adoption, among which a stable and miniaturized high-quality quantum light source is a key component. Here, we establish a complete polarization entanglement-based fully connected network, which features an ultrabright integrated Bragg reflection waveguide quantum source, managed by an untrusted service provider, and a streamlined polarization analysis module, which requires only one single-photon detector for each end user. We perform a continuously working quantum entanglement distribution and create correlated bit strings between users. Within the framework of one-time universal hashing, we provide the first experimental implementation of source-independent quantum digital signatures using imperfect keys circumventing the necessity for private amplification. More importantly, we further beat the 1/3 fault-tolerance bound in Byzantine agreement, achieving unconditional security without relying on sophisticated techniques. Our results offer an affordable and practical route for addressing consensus challenges within the emerging quantum network landscape. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_11441 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Experimental Quantum Byzantine Agreement on a Three-User Quantum Network with Integrated Photonics Jing, Xu Qian, Cheng Weng, Chen-Xun Li, Bing-Hong Chen, Zhe Wang, Chen-Quan Tang, Jie Gu, Xiao-Wen Kong, Yue-Chan Chen, Tang-Sheng Yin, Hua-Lei Jiang, Dong Niu, Bin Lu, Liang-Liang Quantum Physics Quantum communication networks are crucial for both secure communication and cryptographic networked tasks. Building quantum communication networks in a scalable and cost-effective way is essential for their widespread adoption, among which a stable and miniaturized high-quality quantum light source is a key component. Here, we establish a complete polarization entanglement-based fully connected network, which features an ultrabright integrated Bragg reflection waveguide quantum source, managed by an untrusted service provider, and a streamlined polarization analysis module, which requires only one single-photon detector for each end user. We perform a continuously working quantum entanglement distribution and create correlated bit strings between users. Within the framework of one-time universal hashing, we provide the first experimental implementation of source-independent quantum digital signatures using imperfect keys circumventing the necessity for private amplification. More importantly, we further beat the 1/3 fault-tolerance bound in Byzantine agreement, achieving unconditional security without relying on sophisticated techniques. Our results offer an affordable and practical route for addressing consensus challenges within the emerging quantum network landscape. |
| title | Experimental Quantum Byzantine Agreement on a Three-User Quantum Network with Integrated Photonics |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2403.11441 |