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arXiv quant-ph/0212162quant-ph
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基于两个非正交状态的无条件安全密钥分配

Unconditionally Secure Key Distribution Based on Two Nonorthogonal States

Kiyoshi Tamaki, Masato Koashi, Nobuyuki Imoto

摘要:

我们证明了Bennett 1992协议的无条件安全性,通过使用减少到纠缠蒸馏协议发起的本地过滤过程。滤波后的比特误差和相位误差是相关的,并且我们可以通过涉及非正交测量的估计方法从观测到的比特误差中约束相位误差的量。两个状态之间的角度显示了估计的准确性和对噪声的鲁棒性之间的权衡。

英文摘要:

We prove the unconditional security of the Bennett 1992 protocol, by using a reduction to an entanglement distillation protocol initiated by a local filtering process. The bit errors and the phase errors are correlated after the filtering, and we can bound the amount of phase errors from the observed bit errors by an estimation method involving nonorthogonal measurements. The angle between the two states shows a trade-off between accuracy of the estimation and robustness to noises.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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