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Passive decoy state SARG04 quantum-key-distribution with practical photon-number resolving detectors |
| Xu Fang-Xing(许方星), Wang Shuang(王双), Han Zheng-Fu(韩正甫)†ger, and Guo Guang-Can(郭光灿) |
| Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China |
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Abstract SARG04 protocol has its advantages in defending photon number splitting attack, benefited from two-photon pulses part. In this paper, we present a passive decoy state SARG04 scheme combining with practical photon number resolving (PNR) detectors. Two kinds of practical detectors, transition-edge sensor and time-multiplexing detector, are taken into consideration. Theoretical analysis shows that both of them are compatible with the passive decoy state SARG04. Compared with the original SARG04, two detectors can boost the key generation rate and maximal secure distance obviously. Meanwhile, the result shows that quantum efficiency and dark count of the detector influence the maximal distance slightly, which indicates the prospect of implementation in real quantum key distribution system with imperfect practical PNS detectors.
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Received: 25 March 2010
Revised: 11 May 2010
Accepted manuscript online:
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PACS:
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03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2006CB921900), the National Natural Science Foundation of China (Grant Nos. 60537020 and 60621064) and the Innovation Funds of the Chinese Academy of Sciences. |
Cite this article:
Xu Fang-Xing(许方星), Wang Shuang(王双), Han Zheng-Fu(韩正甫), and Guo Guang-Can(郭光灿) Passive decoy state SARG04 quantum-key-distribution with practical photon-number resolving detectors 2010 Chin. Phys. B 19 100312
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