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The performance of active decoy-state quantum key distribution (QKD) system with a practical light source is compared with that of passive decoy-state QKD. The effect of statistical fluctuation due to a finite data size on final secret key rate is analyzed. This procedure is based on the standard error analysis on the assumption that all the variables measured in the experiment fluctuate around their asymptotic values. The relation between key generation rate and secure transmission distance is shown with exchanged quantum efficiency of threshold detector (d=1 and d=0.4) under the condition of active decoy-state (or passive decoy-state ) QKD which we pick the data size to be N=6.0109. This analysis will provide important parameters for practical QKD experiment.
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Keywords:
- decoy state /
- quantum key distribution /
- statistical fluctuation
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[14] Curty M, Ma X F, Qi B, Moroder T 2010 Phys. Rev. A 81 022310
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[1] Bennet C H, Brassard G 1984 Proc. IEEE Interna. Conf. Computers, Systems, and Signal Processing (Bangalore, New York, IEEE)
[2] Boileau J C, Gottesman D, Laflamme R, Poulin D, Spekkens R W 2004 Phys. Rev. Lett.92 017901
[3] Li M M, Wang F Q, Lu Y Q, Zhao F, Chen X, Liang R S, Liu S H 2006 Acta Phys. Sin.55 4642 (in Chinese) [李明明、王发强、路轶群、赵 峰、陈 霞、梁瑞生、刘颂豪 2006 55 4642 ]
[4] Wang J D, Qin X J, Wei Z J, Liu X B, Liao C J, Liu S H 2010 Acta Phys. Sin.59 281 (in Chinese) [王金东、秦晓娟、魏正军、刘小宝、廖常俊、刘颂豪 2010 59 281]
[5] Wang J D, Wei Z J, Zhang H, Zhang H N, Chen S, Qin X J, Guo J P, Liao C J, Liu S H 2010 Acta Phys. Sin.59 5514 (in Chinese)[王金东、魏正军、张 辉、张华妮、陈 帅、秦晓娟、郭健平、廖常俊、刘颂豪2010 59 5514]
[6] Hughes R J 2002 New J. Phys. 4 431
[7] Kurtsiefer C, Zarda P, Halder M, Weinfurter H, Corman P, Tapster P R, Parity J C 2002 Nature 419 450
[8] Hwang W Y 2003 Phys. Rev. Lett. 91 057901
[9] Wang X B 2005 Phys. Rev. Lett. 94 230503
[10] Ma X F, Qi B, Zhao Y, Lo H K 2005 Phys. Rev. A 72 012326
[11] Meyer T, Kampermann H, Kleinmamm M, Brub. D 2007 Phys.Rev. A 74 042340
[12] Hayashi M 2007 Phys.Rev. A 76 012329
[13] Lo H K, Ma X F, Chen K 2005 Phys. Rev. Lett. 94 230504
[14] Curty M, Ma X F, Qi B, Moroder T 2010 Phys. Rev. A 81 022310
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