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首页> 外文期刊>International journal of communication systems >Diversity space of multicarrier continuous‐variable quantum key distribution
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Diversity space of multicarrier continuous‐variable quantum key distribution

机译：多载波连续可变量子密钥分配的分集空间

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摘要

The diversity space of multicarrier continuous-variable quantum key distribution (CVQKD) is defined. The diversity space utilizes the resources that are injected into the transmission by the additional degrees of freedom of the multicarrier modulation. We prove that the exploitable extra degree of freedom in a multicarrier CVQKD scenario significantly extends the possibilities of single-carrier CVQKD. The manifold extraction allows for the parties to reach decreased error probabilities by utilizing those extra resources of a multicarrier transmission that are not available in a single-carrier CVQKD setting. We define the multidimensional manifold space of multicarrier CVQKD and the optimal tradeoff between the available degrees of freedom of the multicarrier transmission. We extend the manifold extraction for the multiple-access AMQD-MQA (multiuser quadrature allocation) multicarrier protocol. The additional resources of multicarrier CVQKD allow the achievement of significant performance improvements that are particularly crucial in an experimental scenario.
机译：定义了多载波连续可变量子密钥分配（CVQKD）的分集空间。分集空间利用通过多载波调制的附加自由度注入到传输中的资源。我们证明了在多载波CVQKD方案中可利用的额外自由度极大地扩展了单载波CVQKD的可能性。通过利用单载波CVQKD设置中不可用的多载波传输的那些额外资源，流形提取允许各方达到降低的错误概率。我们定义了多载波CVQKD的多维流形空间以及多载波传输的可用自由度之间的最佳折衷。我们扩展了用于多址AMQD-MQA（多用户正交分配）多载波协议的流形提取。多载波CVQKD的附加资源可实现显着的性能改进，这在实验情况下尤其重要。

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