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A nonorthogonal passive decoy-state method is presented with a reconstructive weak coherent state source. The method dose not prepare decoy states actively and divides the receiver detection events into two groups, i.e., triggered components and nontriggered components, according to triggering situation of the sender detector. Both triggered and nontriggered components, as signal states and decoy states, are used to do some estimations and to generate secure key. The simulation results show that a better key generation rate and a longer secure transmission distance can be obtained with the nonorthogonal passive decoy-state method than with the existing passive methods, and that the performance is comparable to the theoretical limit of an active infinite decoy-state protocol. Furthermore, the nontriggered component contribution to key generation offsets the limitation of the detector low efficiency, and the performance of the method dose not depend on the detector efficiency of sender. Because decoy states need not be prepared actively, and our protocol is easy to implement and apply to quantum key distribution at high transmission rates.
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Keywords:
- quantum optics /
- quantum key distribution /
- passive decoy state /
- key generation rate
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[59] -
[1] Hwang W Y 2003 Phys.Rev.Lett. 91 057901
[2] [3] Wang X B 2005 Phys.Rev.Lett. 94 230503
[4] [5] Wang X B 2005 Phys. Rev. A 72 012322
[6] Lo H K, MA X F, Chen K 2005 Phys. Rew. Lett. 94 230504
[7] [8] [9] Zhang S L, Zou X B, Li K, Jin C H, Guo G C 2007 Phys. Rev. A 76 044304
[10] [11] Peng C Z, Zhang J, Yang D, Gao W B, Ma H X, Yin H, Zeng H P, Yang T, Wang X B, Pan J W 2007 Phys. Rev. Lett. 98 010505
[12] [13] Yin Z Q, Han Z F, Chen W, Xu F X, Wu Q L, Guo G C 2008 Chin.Phys.Lett. 25 3547
[14] Wang Q, Chen W, Xavier G, Swillo M, Zhang T, Sauge S, Tengner M, Han Z F, Guo G C, Karlsson A 2008 Phys. Rew. Lett. 100 090501
[15] [16] Bennett C H , Brassard G 1984 Processing of IEEE International Conference on Computers, Systems, and Signal Processing (New York: IEEE) p175
[17] [18] [19] MA X F, Qi B, ZhaoY, Lo H K 2005 Phys. Rew. A 72 012326
[20] [21] Li J B, Fang X M 2006 Chin. Phys. Lett. 23 775
[22] [23] Wang Q,Wang X B,Guo G C 2007 Phys. Rew. A 75 012312
[24] [25] Yin Z Q, Han Z F, Sun F W, Guo G C 2007 Phys. Rev. A 76 014304
[26] [27] Mi J L, Wang F Q, Lin Q Q, Liang R S 2008 Chin. Phys. B 17 1178
[28] [29] Hu H P, Wang J D, Huang Y X, Liu S H, Lu W 2010 Acta Phys. Sin. 59 287 (in Chinese) [胡华鹏、王金东、黄宇娴、刘颂豪、路 巍 2010 物理学报 59 287]
[30] Mi J L, Wang F Q, Lin Q Q, Liang R S, Liu S H 2008 Acta Phys. Sin. 57 678 (in Chinese) [米景隆、王发强、林青群、梁瑞生、刘颂豪 2008 物理学报 57 678]
[31] [32] [33] Mauerer W,Silberhorn C 2007 Phys. Rew. A 75 050305
[34] [35] Adachi Y, Yamamoto T, Koashi M, Imoto N 2007 Phys. Rev. Lett. 99 180503
[36] Quan D X, Pei C X, Zhu C H, Liu D 2008 Acta Phys. Sin. 57 5600 (in Chinese) [权东晓、裴昌幸、朱畅华、刘 丹 2008 物理学报 57 5600]
[37] [38] Ma Xiongfeng, Lo H K 2008 New Journal of Physics 10 073018
[39] [40] Curty M, Moroder T, Ma X F, Ltkenhaus N 2009 Opt.Lett. 34 3238
[41] [42] Curty M, Ma X F, Qi B, Moroder T 2010 Phys. Rew. A 81 022310
[43] [44] [45] Scarani V, Acin A, Ribordy G, Gisi N 2004 Phys. Rev. Lett. 92 057901
[46] [47] Fung C H F,Tamaki K,Lo H K 2006 Phys. Rew. A 73 012337
[48] [49] Gottesman D, Lo H K, Ltkenhaus N, Preskill J 2004 Quantum Inform. Comput. 4 325
[50] Gobby C, Yuan Z L, Shields A J 2004 Phys. Rew. Lett. 84 3762
[51] [52] Wang X B 2007 Phys. Rew. A 75 052301
[53] [54] Wang X B, Peng C Z, Zhang J, Yang L, Pan J W 2008 Phys. Rew. A 77 042311
[55] [56] [57] Zhao Y, Qi Bing, Lo H K 2008 Phys. Rew. A 77 052327
[58] Hu J Z, Wang X B 2010 Phys. Rew. A 82 012331
[59]
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