利用无噪线性光放大器增加连续变量量子密钥分发最远传输距离

徐兵杰; 唐春明; 陈晖; 张文政; 朱甫臣

doi:10.7498/aps.62.070301

摘要

如何提高实际量子密钥分发系统的安全码率和最远传输距离是量子密码学领域重要的研究课题. 本文采用量子无噪线性光放大器放大量子信号, 以改进连续变量量子密钥分发系统实际性能. 经仔细研究, 本文发现增益系数为g的线性无噪放大器可将连续变量量子密钥分发系统的最远安全传输距离提高20 log10(g)/a km (a=0.2 dB/km为光纤信道的损耗系数), 并改善系统的安全码率和噪声抗性.

关键词:

Developing quantum key distribution (QKD) protocols that can resist losses and noises is of great importance in practice. We show that the maximum transmission distance and tolerable excess noise of the no-switching CV-QKD protocol can be dramatically increased by using a noiseless linear amplifier (NLA). It is proved that an NLA with a gain g can increase the maximum transmission distance by 20 log10g/α km, where α=0.2 dB/km is the loss coefficient of the fiber channel.

Keywords:

作者及机构信息

1.
保密通信重点实验室, 成都 610041

基金项目: 保密通信重点实验室基金(批准号: 9140C11010111C1104)资助的课题.

Authors and contacts

1.
Science and Technology on Communication Security Laboratory, Chengdu 610041, China

Funds: Project supported by the Science Foundation of Science and Technology on Communication Security Laboratory (Grant Nos. 9140C11010111C1104 ).

参考文献

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[6]	Weedbrook C, Lance A M, Bowen W P, Symul T, Ralph T C, Lam P K 2004 Phys. Rev. Lett. 93 170504
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[24]	Leverrier A, Grangier P 2011 Phys. Rev. A 83 042312
[25]	Yang J, Xu B J, Peng X, Guo H 2012 Phys. Rev. A 85 052302
[26]	Blandino R, Leverrier A, Barbieri M, Etesse J, Grangier P, Tualle-Brouri R 2012 Phys. Rev. A 86 012327
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[37]	Barbieri M, Ferreyrol F, Blandino R, Tualle-Brouri R, Grangier P 2011 Laser Phys. Lett. 8 411
[38]	Zavatta A, Fiurasek J, Bellini M 2011 Nature Photon. 5 52

施引文献

[1]	Scarani V, Bechmann-Pasquinucci H, Cerf N J, Dusek M, Lutkenhaus N, Peev M 2009 Rev. Mod. Phys. 81 1301
[2]	Bennett C H, Brassard G 1984 Proceedings of the IEEE International Conference on Computers, Systems, and Signal Processing (IEEE, New York, 1984) p175
[3]	Wang X B 2005 Phys. Rev. Lett. 94 230503
[4]	Lo H K, Ma X F, Chen K 2005 Phys. Rev. Lett. 94 230504
[5]	Grosshans F, Grangier P 2002 Phys. Rev. Lett. 88 057902
[6]	Weedbrook C, Lance A M, Bowen W P, Symul T, Ralph T C, Lam P K 2004 Phys. Rev. Lett. 93 170504
[7]	Weedbrook C, Pirandola S, Garcia-Patron R, Cerf N J, Ralph T C, Shapiro J H, Lloyd S 2012 Rev. Mod. Phys. 84 621
[8]	Cerf N J, Levy M, Assche G V 2001 Phys. Rev. A 63 052311
[9]	Garcia-Patron R, Cerf N J 2009 Phys. Rev. Lett. 102 130501
[10]	Zhu C H, Pei C X, Quan D X, Chen N, Yi Y H 2009 Acta Phys. Sin. 58 2184 (in Chinese) [朱畅华, 裴昌幸, 权东晓, 陈南, 易运晖 2009 58 2184]
[11]	Chen J J, Han Z F, Zhao Y B, Gui Y Z, Guo G C 2007 Acta Phys. Sin. 56 5 (in Chinese) [陈进建, 韩正甫, 赵义博, 桂有珍, 郭光灿 2007 56 5]
[12]	Garcia-Patron R, Cerf N J 2006 Phys. Rev. Lett. 97 190503
[13]	Navascues M, Grosshans F, Acin A 2006 Phys. Rev. Lett. 97 190502
[14]	Pirandola S, Braunstein S L, Lloyd S 2008 Phys. Rev. Lett. 101 200504
[15]	Leverrier A, Grangier P Phys. Rev. A 81 062314
[16]	Garcia-Patron R 2007 Ph. D. Dissertation (Bruxelles University)
[17]	Renner R, Cirac J I 2009 Phys. Rev. Lett. 102 110504
[18]	Lodewyck J, Bloch M, Garcia-Patron R, Fossier S, Karpov E, Diamanti E, Debuisschert T, Cerf N J, Tualle-Brouri R, McLaughlin S W, Grangier P 2007 Phys. Rev. A 76 042305
[19]	Fossier S, Diamanti E, Debuisschert T, Villing A, Tualle-Brouri R, Grangier P 2009 New J. Phys. 11 045023
[20]	Jouguet P, Kunz-Jacques S, Leverrier A 2011 Phys. Rev. A 84 062317
[21]	He G Q, Guo H B, Li Y D, Zhu S W, Zeng G H 2008 Acta Phys. Sin. 56 5 (in Chinese) [何广强, 郭红斌, 李昱丹, 朱思维, 曾贵华 2008 57 2212]
[22]	Leverrier A, Grangier A 2009 Phys. Rev. Lett. 102 180504
[23]	Shen Y, Zou H X 2010 Acta Phys. Sin. 59 1473 (in Chinese) [沈咏, 邹宏新 2010 59 1473]
[24]	Leverrier A, Grangier P 2011 Phys. Rev. A 83 042312
[25]	Yang J, Xu B J, Peng X, Guo H 2012 Phys. Rev. A 85 052302
[26]	Blandino R, Leverrier A, Barbieri M, Etesse J, Grangier P, Tualle-Brouri R 2012 Phys. Rev. A 86 012327
[27]	Zhang H, Fang J, He G Q 2012 Phys. Rev. A 86 022338
[28]	Xu B J, Tang C M, Chen H, Zhang W Z, Zhu F C 2012 arXiv:1210.0107
[29]	Ralph T C, Lund A P 2009 Quantum Communication Measurement and Computing, Proceedings of 9th International Conference, edited by A. Lvovsky (AIP, New York, 2009) p155
[30]	Micuda M, Straka I, Mikova M, Dusek M, Cerf N J, Fiurasek J, Jezek M 2012 arXiv: 1206.2852
[31]	Meng G S, Yang S, Zou X B, Zhang S L, Shi B S, Guo G C 2012 Phys. Rev. A 86 042305
[32]	Xiang G Y, Ralph T C, Lund A P, Walk N, Pryde G J 2010 Nature Photon. 4 316
[33]	Zhang S L, Yang S, Zou X B, Shi B S, Guo G C 2012 Phys. Rev. A 86 034302
[34]	Brask J B, Brunner N, Cavalcanti D, Leverrier A 2012 Phys. Rev. A 85 042116
[35]	Ferreyrol F, Barbieri M, Blandino R, Fossier S, Tualle-Brouri R, Grangier P 2010 Phys. Rev. Lett. 104 123603
[36]	Ferreyrol F, Blandino R, Barbieri M, Tualle-Brouri R, Grangier P 2011 Phys. Rev. A 83 063801
[37]	Barbieri M, Ferreyrol F, Blandino R, Tualle-Brouri R, Grangier P 2011 Laser Phys. Lett. 8 411
[38]	Zavatta A, Fiurasek J, Bellini M 2011 Nature Photon. 5 52

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