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arXiv 0705.2627quant-ph
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高斯噪声下基于后选择的连续变量量子密钥分发的实验验证

Experimental Demonstration of Post-Selection based Continuous Variable Quantum Key Distribution in the Presence of Gaussian Noise

Thomas Symul, Daniel J. Alton, Syed M. Assad, Andrew M. Lance, Christian Weedbrook, Timothy C. Ralph, Ping Koy Lam

摘要:

在实际的连续变量量子密钥分发协议中,窃听者可以利用传输过程中产生的额外高斯噪声来掩盖她的存在。我们提出了一个理论框架后选择为基础的协议,明确考虑到多余的高斯噪声。基于Levitin和Holevo界,我们推导出了密钥速率的定量表达式。我们的实验表明,后选择为基础的计划仍然是安全的,对个人和集体高斯攻击,在存在这种多余的噪声。

英文摘要:

In realistic continuous variable quantum key distribution protocols, an eavesdropper may exploit the additional Gaussian noise generated during transmission to mask her presence. We present a theoretical framework for a post-selection based protocol which explicitly takes into account excess Gaussian noise. We derive a quantitative expression of the secret key rates based on the Levitin and Holevo bounds. We experimentally demonstrate that the post-selection based scheme is still secure against both individual and collective Gaussian attacks in the presence of this excess noise.

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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