Tomography increases key rates of quantum-key-distribution protocols
Tomography increases key rates of quantum-key-distribution protocols
复制标题
DOI：
10.1103/physreva.78.042316
复制
发表时间：
2008-02
影响因子：
2.9
通讯作者：
Shun Watanabe;R. Matsumoto;T. Uyematsu
中科院分区：
文献类型：
--
作者：
Shun Watanabe;R. Matsumoto;T. Uyematsu
我们构造了一个实际可实现的经典处理Bennett-Bennard 1984（BB84）协议和六态协议，充分利用准确的信道估计方法，这也被称为量子层析成像。我们提出的处理产量至少一样高的标准处理由Shor和Preskill的关键率。我们展示了两个量子信道的例子，在这些量子信道上，我们提出的处理的密钥速率严格高于标准处理。在第二个例子中，BB84协议与我们提出的处理产生一个积极的关键率，即使所谓的错误率高于25%的限制。
We construct a practically implementable classical processing for the Bennett-Brassard 1984 (BB84) protocol and the six-state protocol that fully utilizes the accurate channel estimation method, which is also known as the quantum tomography. Our proposed processing yields at least as high a key rate as the standard processing by Shor and Preskill. We show two examples of quantum channels over which the key rate of our proposed processing is strictly higher than the standard processing. In the second example, the BB84 protocol with our proposed processing yields a positive key rate even though the so-called error rate is higher than the 25% limit.