High-dimensional quantum key distribution with statistical and intensity fluctuations

IF 2.3 4区物理与天体物理 Q2 OPTICS

Fiber and Integrated Optics Pub Date : 2020-07-03 DOI:10.1080/01468030.2020.1814907

Yang Wang, Ya-Hui Gan

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引用次数: 0

Abstract

ABSTRACT High-dimensional quantum key distribution (HD-QKD) can higher the secret-key capacity and tolerate more errors. Several HD-QKD experiments have been demonstrated over deployed fibers to show promising future toward high-dimensional quantum communication networks. However, the practical security of HD-QKD systems should be widely considered before large-scale application of HD-QKD systems. In this paper, we focus on the HD-QKD based on the dispersive optics (DO-QKD) with both statistical and intensity fluctuations. For the condition only with statistical fluctuations, we present the parameter estimation based on an improved Chernoff bound. When considering the condition with both statistical and intensity fluctuations, we present the parameter estimation based on Azuma’s inequality. By numerical simulations, we find that the parameter estimation for DO-QKD based on the improved Chernoff bound is tighter than the previous work in terms of the secret-key capacity and the maximum transmission distance. Moreover, we find that intensity fluctuations affect the performance of DO-QKD greatly and the effect on smaller data size is more obvious.

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具有统计和强度波动的高维量子密钥分布

高维量子密钥分发(HD-QKD)具有更高的密钥容量和更大的容错能力。几个HD-QKD实验已经在部署的光纤上进行了演示，显示了高维量子通信网络的前景。然而，在大规模应用HD-QKD系统之前，需要广泛考虑HD-QKD系统的实际安全性。本文主要研究具有统计波动和强度波动的基于色散光学的HD-QKD (DO-QKD)。对于只有统计波动的情况，我们给出了基于改进Chernoff界的参数估计。在同时考虑统计波动和强度波动的情况下，提出了基于Azuma不等式的参数估计方法。通过数值模拟，我们发现基于改进Chernoff界的DO-QKD参数估计在秘钥容量和最大传输距离方面比以前的工作更严格。此外，我们发现强度波动对DO-QKD的性能影响较大，且对较小数据量的影响更为明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fiber and Integrated Optics 物理-光学

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Fiber and Integrated Optics , now incorporating the International Journal of Optoelectronics, is an international bimonthly journal that disseminates significant developments and in-depth surveys in the fields of fiber and integrated optics. The journal is unique in bridging the major disciplines relevant to optical fibers and electro-optical devices. This results in a balanced presentation of basic research, systems applications, and economics. For more than a decade, Fiber and Integrated Optics has been a valuable forum for scientists, engineers, manufacturers, and the business community to exchange and discuss techno-economic advances in the field.