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Analysis on quantum bit error rate in measurement-device-independent quantum key distribution using weak coherent states

Du Ya-Nan Xie Wen-Zhong Jin Xuan Wang Jin-Dong Wei Zheng-Jun Qin Xiao-Juan Zhao Feng Zhang Zhi-Ming

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Analysis on quantum bit error rate in measurement-device-independent quantum key distribution using weak coherent states

Du Ya-Nan, Xie Wen-Zhong, Jin Xuan, Wang Jin-Dong, Wei Zheng-Jun, Qin Xiao-Juan, Zhao Feng, Zhang Zhi-Ming
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  • A measurement-device-independent quantum key distribution (MDI-QKD) protocol is immune to all detection side-channel attacks and guarantees the information-theoretical security even with uncharacterized single photon detectors. A weak coherent source is used in the current MDI-QKD experiments, it inevitably contains a certain percentage of vacuum and multi-photon pulses. The security issues introduced by these source imperfections can be avoided by applying the decoy state method. Here, through modeling experimental devices, and taking into account the weak coherent source and the threshold detectors, we have evaluated the gain, the probability to get successful Bell measurement and incorrect Bell measurement, and the quantum bit error rate (QBER), given a practical setup. In our simulation, we show how QBER varies with different transmission distances in the cases when the average photon numbers per pulse from Alice and Bob are symmetric and asymmetric. Result shows that the multi-photon pulses do not cause error in the Z basis of polarization encoding scheme, but produce a large QBER in phase encoding scheme and in the X basis of polarization encoding scheme. QBER is affected by the dark count rate and the system optical error associated with the multi-photon pulses. For different encoding schemes, QBER caused by each kind of average photon numbers from Alice and Bob increases to different degrees with the transmission distance, and finally is close to 50%. With the increase of the transmission distance, the average photon number per pulse decreases and the fraction of the dark count rate causing QBER gradually increases. Under the same effect of the dark count rate, the smaller the average photon number per pulse, the bigger the QBER. After a certain transmission and at the same transmission distance, the QBER is largest when average photon numbers used by Alice and Bob are both smallest. For the short distance transmission of phase encoding scheme and the X basis, we find that QBER is larger when average photon numbers from the two arms are asymmetric, as compared to the symmetric case. For the Z basis, the QBER caused by the system optical error and the dark count rate is very small.
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61378012, 61401262, 11374107), the Major Research Plan of the National Natural Science Foundation of China(Grant No. 91121023), the National Basic Research Program of China (Grant Nos. 2011CBA00200, 2013CB921804), the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (Grant No. IRT1243), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20124407110009).
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    Gisin N, Ribordy G, Tittel W, Zbinden H 2002 Rev. Mod. Phys. 74 145

    [2]

    Li M, Patcharapong T, Zhang C M, Yin Z Q, Chen W, Han Z F 2015 Chin. Phys. B 24 010302

    [3]

    Ma H Q, Wei K J, Yang J H, Li R X, Zhu W 2014 Chin. Phys. B 23 100307

    [4]

    Chen W F, Wei Z J, Guo L, Hou L Y, Wang G, Wang J D, Zhang Z M, Guo J P, Liu S H 2014 Chin. Phys. B 23 080304

    [5]

    Zhou Y Y, Zhou X J, Tian P G, Wang Y J 2013 Chin. Phys. B 22 010305

    [6]

    Zhou R R, Y L 2012 Chin. Phys. B 21 080301

    [7]

    Lo H K, Chau H F 1999 Science 283 2050

    [8]

    Shor P W, Preskill J 2000 Phys. Rev. Lett. 85 441

    [9]

    Mayers D 2001 J. ACM 48 351

    [10]

    Makarov V, Anisimov A, Skaar J 2006 Phys. Rev. A 74 022313

    [11]

    Zhao Y, Fung C H F, Qi B, Chen C, Lo H K 2008 Phys. Rev. A 78 042333

    [12]

    Fung C H F, Qi B, Tamaki K, Lo H K 2007 Phys. Rev. A 75 032314

    [13]

    Jain N, Wittmann C, Lydersen L, Wiechers C, Elser D, Marquardt C, Makarov V, Leuchs G 2011 Phys. Rev. Lett. 107 110501

    [14]

    Acín A, Brunner N, Gisin N, Massar S, Pironio S, Scarani V 2007 Phys. Rev. Lett. 98 230501

    [15]

    Gisin N, Pironio S, Sangouard N 2010 Phys. Rev. Lett. 105 070501

    [16]

    Lo H K, Curty M, Qi B 2012 Phys. Rev. Lett. 108 130503

    [17]

    Ma X, Razavi M 2012 Phys. Rev. A 86 062319

    [18]

    Tang Y L, Yin H L, Chen S J, Liu Y, Zhang W J, Jiang X, Zhang L, Wang J, You L X, Guan J Y, Yang D X, Wang Z, Liang H, Zhang Z, Zhou N, Ma X, Chen T Y, Zhang Q, Pan J W 2015 IEEE J. Select. Topics Quantum Electron. 21 6600407

    [19]

    Zhou C, Bao W S, Chen W, Li H W, Yin Z Q, Wang Y, Han Z F 2013 Phys. Rev. A 88 052333

    [20]

    Wang Y, Bao W S, Li H W, Zhou C, Li Y 2014 Chin. Phys. B 23 080303

    [21]

    Dong C, Zhao S H, Zhao W H, Shi L, Zhao G H 2014 Acta Phys. Sin. 63 030302 (in Chinese) [东晨, 赵尚弘, 赵卫虎, 石磊, 赵顾灏 2014 物理学报 63 030302]

    [22]

    Liu Y, Chen T Y, Wang L J, Liang H, Shentu G L, Wang J, Cui K, Yin H L, Liu N L, Li L, Ma X, Pelc J S, Fejer M M, Peng C Z, Zhang Q, Pan J W 2013 Phys. Rev. Lett. 111 130502

    [23]

    da Silva T F, Vitoreti D, Xavier G B, do Amaral G C, Tempor o G P, von der Weid J P 2013 Phys. Rev. A 88 052303

    [24]

    Wang Q, Wang X B 2013 Phys. Rev. A 88 052332

    [25]

    Dong C, Zhao S H, Zhang N, Dong Y, Zhao W H, Liu Y 2014 Acta Phys. Sin. 63 200304 (in Chinese) [东晨, 赵尚弘, 张宁, 董毅, 赵卫虎, 刘韵 2014 物理学报 63 200304]

    [26]

    Li M, Zhang C M, Yin Z Q, Chen W, Wang S, Guo G C, Han Z F 2014 Opt. Lett. 39 880

    [27]

    Ma X, Fung C H F, Razavi M 2012 Phys. Rev. A 86 052305

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Publishing process
  • Received Date:  21 October 2014
  • Accepted Date:  02 January 2015
  • Published Online:  05 June 2015

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