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arXiv 0810.0483quant-ph
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基于纠缠的量子密钥分发的实用随机数产生协议

Practical random number generation protocol for entanglement-based quantum key distribution

G. B. Xavier, T. Ferreira da Silva, G. Vilela de Faria, G. P. Temporao, J. P. von der Weid

摘要:

利用单光子计数模块固有的随机检测时间,提出了一种简单的协议,用于在量子密钥分发(QKD)中使用基于纠缠的协议时随机选择有效基。在某些情况下,它也可以适用于BB84协议。所提出的方案使用已经存在于QKD装置上的单光子探测器,以与系统能够探测的速率相同的速率工作,因此不受量子随机数发生器的输出速率的限制。该协议只需要很小的硬件修改,使其成为一个有吸引力的解决方案。我们进行了一个原理验证实验,采用自发的参数下转换过程中的$χ^{(2)}$非线性晶体,以证明我们的计划的可行性,并表明所产生的序列通过随机性测试。

英文摘要:

A simple protocol which takes advantage of the inherent random times of detections in single photon counting modules is presented for random active basis choices when using entanglement-based protocols for Quantum Key Distribution (QKD). It may also be applicable to the BB84 protocol in certain cases. The scheme presented uses the single photon detectors already present on a QKD setup, working on the same rate as the system is capable of detecting, and is, therefore, not limited by the output rates of quantum random number generators. This protocol only requires small hardware modifications making it an attractive solution. We perform a proof-of-principle experiment employing a spontaneous parametric down-conversion process in a $χ^{(2)}$ non-linear crystal to demonstrate the feasibility of our scheme, and show that the generated sequence passes randomness tests.

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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