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arXiv 1206.0936quant-ph
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连续变量量子密码的高斯后选择算法

Gaussian Post-selection for Continuous Variable Quantum Cryptography

Nathan Walk, Thomas Symul, Ping Koy Lam, Timothy C. Ralph

摘要:

我们扩展了连续变量量子密钥分发协议的安全性证明,考虑到任意窃听攻击,通过采用一个等价的协议的概念,其中后选择实现为一系列的量子操作,包括虚拟蒸馏。我们引入了一个特定的“高斯”后选择,并证明了安全性可以计算使用实验访问量。最后,我们明确评估的情况下,一个嘈杂的高斯信道的无限密钥长度的限制的性能,并发现在现实的制度,所有预先存在的连续变量协议的改进。

英文摘要:

We extend the security proof for continuous variable quantum key distribution protocols using post selection to account for arbitrary eavesdropping attacks by employing the concept of an equivalent protocol where the post-selection is implemented as a series of quantum operations including a virtual distillation. We introduce a particular `Gaussian' post selection and demonstrate that the security can be calculated using only experimentally accessible quantities. Finally we explicitly evaluate the performance for the case of a noisy Gaussian channel in the limit of unbounded key length and find improvements over all pre-existing continuous variable protocols in realistic regimes.

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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