基于量子远程通信的连续变量量子确定性密钥分配协议

宋汉冲; 龚黎华; 周南润

doi:10.7498/aps.61.154206

摘要

基于量子远程通信的原理, 本文借助双模压缩真空态和相干态, 提出一种连续变量量子确定性密钥分配协议. 在利用零差探测法的情况下协议的传输效率达到了100%. 从信息论的角度分析了协议的安全性, 结果表明该协议可以安全传送预先确定的密钥. 在密钥管理中, 量子确定性密钥分配协议具有量子随机性密钥分配协议不可替代的重要地位和作用. 与离散变量量子确定性密钥分配协议相比, 该协议分发密钥的速率和效率更高, 又协议中用到的连续变量量子态易于产生和操控、适于远距离传输, 因此该协议更具有实际意义.

关键词:

Abstract

By exploiting quantum teleportation, we propose a continuous-variable quantum deterministic key distribution (CVQDKD) protocol using two-mode squeezed vacuum state and coherent state. The efficiency is 100% under the homodyne detection. The security of CVQDKD is analyzed in detail from information theory, and the result shows that the proposed protocol can securely hand over the pre-deterministic key. By contrast with the quantum random key distribution, the quantum deterministic key distribution plays an irreplaceable role in the field of key management. Furthermore, the CVQDKD can obtain a higher rate and better efficiency than the quantum deterministic key distribution protocols with discrete variables, and the quantum states used in the protocol are also easy to produce and manipulate, which i suitable for long-distance transmission. Therefore, the CVQDKD protocol is more practical.

Keywords:

continuous-variable /
quantum deterministic key distribution /
key management /
quantum communication

作者及机构信息

1.
南昌大学电子信息工程系, 南昌 330031

基金项目: 国家自然科学基金(批准号: 10647133, 11174118), 江西省自然科学基金(批准号: 2009GQS0080), 江西省教育厅科技项目(批准号: GJJ11339)和南昌大学引进人才科研启动费资助的课题.

Authors and contacts

1.
Department of Electronic Information Engineering, Nanchang University, Nanchang 330031, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 10647133 and 11174118), the Natural Science Foundation of Jiangxi Province, China (Grant No. 2009GQS0080), the Research Foundation of the Education Department of Jiangxi Province (Grant No. GJJ11339), and the Scientific Research Start-up Funds for the Recruitment of Talent of Nanchang University.

参考文献

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[12]	Patron R G, Cerf N J 2009 Phys. Rev. Lett. 102 130501
[13]	Qian X D, He G Q, Zeng G H 2009 Sci. China. Ser. F 52 2072
[14]	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]
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[16]	Qi B, Zhu W, Qian L, Lo H K 2010 New J. Phys. 12 103042
[17]	Namekata N, Takesue H, Honjo T, Tokura Y, Inouen S 2011 Opt. Expr. 19 10632
[18]	Leverrier A, Grangier P 2011 Phys. Rev. A 83 042312
[19]	Zhou N R, Zeng G H, Nie Y Y, Xiong J, Zhu F C 2006 Physica A 362 305
[20]	He G Q, Zhu J, Zeng G H 2006 Phys. Rev. A 73 012314
[21]	Zhou N R, Wang L J, Ding J, Gong L H 2010 Phys. Scr. 81 045009
[22]	Zhou N R, Wang L J, Ding J, Gong L H, Zuo X W 2010 Int. J. Theor. Phys. 49 2035
[23]	Zhou N R, Wang L J, Gong L H, Zuo X W Liu Y 2010 Opt. Commun. 284 4836
[24]	Song T Q 2004 Acta Phys. Sin. 53 3358 (in Chinese) [宋同强 2004 53 3358]
[25]	Yan W, Zhang W J 2007 Chin. Phys. 16 2584
[26]	Weedbrook C 2003 Quantum cryptography without basis switching, University of Queensland

施引文献

[1]	Ralph T C 1999 Phys. Rev. A 61 010303
[2]	Ralph T C 2000 Phys. Rev. A 62 062306
[3]	Cerf N J, Levy M, Assche G V 2001 Phys. Rev. A 63 052311
[4]	Grosshans F, Grangier P 2002 Phys. Rev. Lett. 88 057902
[5]	Silberhorn C, Ralph T C, Lutkenhaus N, Leuchs G 2002 Phys. Rev. Lett. 89 167901
[6]	Grosshans F, Assche G V, Wenger J, Brouri R, Cerf N J, Grangier P 2003 Nature 421 238
[7]	Weedbrook C, Lance A M, Bowen W P, Symul T, Ralph T C, Lam P K 2004 Phys. Rev. Lett. 93 170504
[8]	Ma H Q, Li Y L, Zhao H, Wu L A 2005 Acta Phys. Sin. 54 5014 (in Chinese) [马海强, 李亚玲, 赵环, 吴令安 2005 54 5014]
[9]	Namiki R 2006 Phys. Rev. A 74 032302
[10]	He G Q, Zeng G H 2006 Commun. Theor. Phys. 46 16
[11]	Lodewyck J, Bloch M, Patron R G, Fossier S, Karpov E, Diamanti E, Debuisschert T 2007 Phys. Rev. A 76 042305
[12]	Patron R G, Cerf N J 2009 Phys. Rev. Lett. 102 130501
[13]	Qian X D, He G Q, Zeng G H 2009 Sci. China. Ser. F 52 2072
[14]	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]
[15]	Wei Z J, Wan W, Wang J D, Liao C J, Liu S H 2011 Acta Phys. Sin. 60 094217 (in Chinese) [魏正军, 万伟, 王金东, 廖常俊, 刘颂豪 2011 60 094217]
[16]	Qi B, Zhu W, Qian L, Lo H K 2010 New J. Phys. 12 103042
[17]	Namekata N, Takesue H, Honjo T, Tokura Y, Inouen S 2011 Opt. Expr. 19 10632
[18]	Leverrier A, Grangier P 2011 Phys. Rev. A 83 042312
[19]	Zhou N R, Zeng G H, Nie Y Y, Xiong J, Zhu F C 2006 Physica A 362 305
[20]	He G Q, Zhu J, Zeng G H 2006 Phys. Rev. A 73 012314
[21]	Zhou N R, Wang L J, Ding J, Gong L H 2010 Phys. Scr. 81 045009
[22]	Zhou N R, Wang L J, Ding J, Gong L H, Zuo X W 2010 Int. J. Theor. Phys. 49 2035
[23]	Zhou N R, Wang L J, Gong L H, Zuo X W Liu Y 2010 Opt. Commun. 284 4836
[24]	Song T Q 2004 Acta Phys. Sin. 53 3358 (in Chinese) [宋同强 2004 53 3358]
[25]	Yan W, Zhang W J 2007 Chin. Phys. 16 2584
[26]	Weedbrook C 2003 Quantum cryptography without basis switching, University of Queensland

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