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arXiv 1406.0973quant-ph
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利用压缩态实现与连续变量测量设备无关的量子密钥分发

Continuous-variable measurement-device-independent quantum key distribution using squeezed states

Yi-Chen Zhang, Zhengyu Li, Song Yu, Wanyi Gu, Xiang Peng, Hong Guo

摘要:

提出了一种利用压缩态的连续变量测量设备无关的量子密钥分发(CV-MDI QKD)协议。安全性分析表明,该协议不仅可以保护所有检测器侧信道,而且比基于相干状态的协议获得更高的密钥速率。我们还提出了一种方法来改善压缩状态CV-MDI QKD协议,通过添加适当的高斯噪声的协调侧。研究发现,存在一个最优的附加噪声,以优化的关键速率和最大传输距离方面的协议的性能。由此产生的协议显示了使用CV-MDI QKD协议进行长距离安全通信的潜力。

英文摘要:

A continuous-variable measurement-device-independent quantum key distribution (CV-MDI QKD) protocol using squeezed states is proposed where the two legitimate partners send Gaussian-modulated squeezed states to an untrusted third party to realize the measurement. Security analysis shows that the protocol can not only defend all detector side channels, but also attain higher secret key rates than the coherent-state-based protocol. We also present a method to improve the squeezed-state CV-MDI QKD protocol by adding proper Gaussian noise to the reconciliation side. It is found that there is an optimal added noise to optimize the performance of the protocol in terms of both key rates and maximal transmission distances. The resulting protocol shows the potential of long-distance secure communication using the CV-MDI QKD protocol.

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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