论文标题
带有多光子脉冲的量子键分布：优势
Quantum key distribution with multiphoton pulses: An advantage
论文作者
论文摘要
在本文中，我们根据巧合测量引入了视线通道线的量子密钥分布协议。我们提出了协议的概念验证实施。我们表明，使用巧合测量来监视多光子脉冲会导致此类通道的较长距离的较高安全键。该关键速率高于基于BB84的量子密钥分布协议的流行实现，例如，GLLP分析[Quant。信息。计算。 \ textbf {4}，325（2004）]。在实验中，与具有相似参数的BB84协议的GLLP分析相比，每个信号脉冲的$ 74 \％$ $较高的密钥位和平均光子数量的相等值相比。
In this article, we introduce a quantum key distribution protocol for the line of sight channels based on coincidence measurements. We present a proof-of-concept implementation of our protocol. We show that using coincidence measurements to monitor multi-photon pulses results in a higher secure key rate over longer distances for such channels. This key rate is higher than popular implementations of quantum key distribution protocol based on BB84, for example, the GLLP analysis [Quant. Info. Comput. \textbf{4}, 325 (2004)]. In the experiment, we could generate around $74 \%$ more key bits per signal pulse as compared to the GLLP analysis of BB84 protocol with similar parameters and equal value of mean photon number.
