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- W4381740702 endingPage "1449" @default.
- W4381740702 startingPage "1449" @default.
- W4381740702 abstract "The quantum network makes use of quantum states to transmit data, which will revolutionize classical communication and allow for some breakthrough applications. Quantum key distribution (QKD) is one prominent application of quantum networks, and can protect data transmission through quantum mechanics. In this work, we propose an expandable and cost-effective quantum access network, in which the round-trip structure makes quantum states travel in a circle to carry information, and the multi-band technique is proposed to support multi-user access. Based on the round-trip multi-band quantum access network, we realize multi-user secure key sharing through the continuous-variable QKD (CV-QKD) protocol. Due to the encoding characteristics of CV-QKD, the quadrature components in different frequency bands can be used to transmit key information for different users. The feasibility of this scheme is confirmed by comprehensive noise analysis, and is verified by a proof-of-principle experiment. The results show that each user can achieve excess noise suppression and 600 bit/s level secure key generation under 30 km standard fiber transmission. Such networks have the ability of multi-user access theoretically and could be expanded by plugging in simple modules. Therefore, it paves the way for near-term large-scale quantum secure networks." @default.
- W4381740702 created "2023-06-24" @default.
- W4381740702 creator A5006016257 @default.
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- W4381740702 creator A5030226818 @default.
- W4381740702 creator A5076655768 @default.
- W4381740702 creator A5085142676 @default.
- W4381740702 date "2023-08-01" @default.
- W4381740702 modified "2023-10-17" @default.
- W4381740702 title "Round-trip multi-band quantum access network" @default.
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- W4381740702 doi "https://doi.org/10.1364/prj.492448" @default.
- W4381740702 hasPublicationYear "2023" @default.