Optimized quantum entanglement network enabled by a state-multiplexing quantum light source
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arXiv
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| Format: | Preprint |
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2025
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| author | Fan, Yun-Ru Luo, Yue Guo, Kai Wu, Jin-Peng Zeng, Hong Deng, Guang-Wei Wang, You Song, Hai-Zhi Wang, Zhen You, Li-Xing Guo, Guang-Can Zhou, Qiang |
| author_facet | Fan, Yun-Ru Luo, Yue Guo, Kai Wu, Jin-Peng Zeng, Hong Deng, Guang-Wei Wang, You Song, Hai-Zhi Wang, Zhen You, Li-Xing Guo, Guang-Can Zhou, Qiang |
| contents | A fully connected quantum network with a wavelength division multiplexing architecture plays an increasingly pivotal role in quantum information technology. With such architecture, an entanglement-based network has been demonstrated in which an entangled photon-pair source distributes quantum entanglement resources to many users. Despite these remarkable advances, the scalability of the architecture could be constrained by the finite spectrum resource, where O(N^2)wavelength channels are needed to connect N users, thus impeding further progress in real-world scenarios. Here, we propose an optimized scheme for the wavelength division multiplexing entanglement-based network using a state-multiplexing quantum light source. With a dual-pump configuration, the feasibility of our approach is demonstrated by generating state-multiplexing photon pairs at multiple wavelength channels with a silicon nitride microring resonator chip. In our demonstration, we establish a fully connected graph between four users with six wavelength channels - saving half of which without sacrificing functionality and performance of the secure communication. A total asymptotic secure key rate of 1946.9 bps is obtained by performing the BBM92 protocol with the distributed state. The network topology of our method has great potential for developing a scalable quantum network with significantly minimized infrastructure requirements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_19740 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optimized quantum entanglement network enabled by a state-multiplexing quantum light source Fan, Yun-Ru Luo, Yue Guo, Kai Wu, Jin-Peng Zeng, Hong Deng, Guang-Wei Wang, You Song, Hai-Zhi Wang, Zhen You, Li-Xing Guo, Guang-Can Zhou, Qiang Quantum Physics A fully connected quantum network with a wavelength division multiplexing architecture plays an increasingly pivotal role in quantum information technology. With such architecture, an entanglement-based network has been demonstrated in which an entangled photon-pair source distributes quantum entanglement resources to many users. Despite these remarkable advances, the scalability of the architecture could be constrained by the finite spectrum resource, where O(N^2)wavelength channels are needed to connect N users, thus impeding further progress in real-world scenarios. Here, we propose an optimized scheme for the wavelength division multiplexing entanglement-based network using a state-multiplexing quantum light source. With a dual-pump configuration, the feasibility of our approach is demonstrated by generating state-multiplexing photon pairs at multiple wavelength channels with a silicon nitride microring resonator chip. In our demonstration, we establish a fully connected graph between four users with six wavelength channels - saving half of which without sacrificing functionality and performance of the secure communication. A total asymptotic secure key rate of 1946.9 bps is obtained by performing the BBM92 protocol with the distributed state. The network topology of our method has great potential for developing a scalable quantum network with significantly minimized infrastructure requirements. |
| title | Optimized quantum entanglement network enabled by a state-multiplexing quantum light source |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2502.19740 |