讨论基于微弱相干脉冲的相位差分量子密钥分发系统,综合分析系统的安全性问题,给出了密钥生成效率表达式.分析诱惑态对相位差分量子密钥分发系统安全性的影响,并给出了结合诱惑态后的密钥生成效率表达式.分析结果表明,结合诱惑态的相位差分量子密钥分发过程不再受到分光子攻击和序列攻击的威胁,其密钥分发效率与Hoi-Kwong等提出的诱惑态的表述结果一致.实验数据显示,结合诱惑态后的相位差分系统.其安全传输距离得到了进一步提高,量子密钥分发效率提高了约1个数量级.
参考文献
| [1] | Lutkenhaus N.Security against individual attacks for realistic quantum key distribution[J].Phys.Rev.A,2000,61:052304. |
| [2] | Gobby C,Yuan Z L,Shields A J.Quantum key distribution over 122 km of standard telecom fiber[J].Appl.Phys.Lett.,2004,84(19):3762-3763. |
| [3] | Mo X F,Zhu B,Han Z F,et al.Faraday-Michelson system for quantum cryptography[J].Opt.Lett.,2005,30(19):2632-2634. |
| [4] | Liu Y,Liu R F,Li N,et al.Direct deterministic communication On quantum channel[J].Chinese Journal of Quantum Electronics(量子电子学报),2006,23(4):441-444(in Chinese). |
| [5] | Zhu A D,Zhang S.Quantum key distribution and controlled quantum direct communication applying product state of qutrit[J].Chinese Journal of Quantum Electronics(量子电子学报),2007,24(3):316-322(in Chinese). |
| [6] | Takesue H,Diamanti E,Honjo T,et al.Differential phase shift quantum key distribution experiment over 105 km fibre[J].New Journal of Physics,2005,7:232. |
| [7] | Hiroki T,Eleni D,et al.10-GHz clock differential phase shift quantum key distribution experiment[J].Opt.Exp.,2006,14(20):9522-9530. |
| [8] | Waks E,Takesue H,Yamamoto Y.Security of differential-phase-shift quantum key distribution against individual attacks[J].Phys.Rev.A,2006,73:012344. |
| [9] | Lo H K,Ma X F,Chen K.Decoy state quantum key distribution[J].Phys.Rev.Lett.,2005,94:230504. |
| [10] | Inoue K,Honjo T.Robustness of differential-phase-shift quantum key distribution against photon-number-splitting attack[J].Phys.Rev.A,2005,71:042305. |
| [11] | Zhao F,Fu M X,Lu Y Q,et al.Infuence of multi-photon pulses on practical differential-phase-shift quantum key distribution[J].Chinese Physics,2007,16(11):3402-3406. |
| [12] | Inoue K,Takesue H,Honjo T.Differential-phase-shift quantum key distribution[C].SPIE,2007,6780:678015. |
| [13] | Ma X F,Qi B,Zhao Y,et al.Practical decoy state for quantum key distribution[J].Phys.Rev.A,2005,72,012326. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%