Four-State Modulation in Middle of a Quantum Channel for Continuous-Variable Quantum Key Distribution Protocol with Noiseless Linear Amplifier

论文摘要

We characterize a modified continuous-variable quantum key distribution（CV-QKD）protocol with four states in the middle of a quantum channel.In this protocol,two noiseless linear amplifiers（NLAs） are inserted before each detector of the two parts,Alice and Bob,with the purpose of increasing the secret key rate and the maximum transmission distance.We present the performance anal.ysis of the new four-state CV-QKD protocol over a Gaussian lossy and noisy channel.The simulation results show that the NLAs with a reasonable gain g can effectively enhance the secret key rate as well as the maximum transmission distance,which is generally satisfied in practice.

论文目录

文章来源

类型: 期刊论文

作者: 毛宇,刘淇,郭迎,张航,周健

来源: Chinese Physics Letters 2019年10期

年度: 2019

分类: 基础科学,信息科技

专业: 物理学,无线电电子学,电信技术

单位: School of Automation, Central South University,College of Science, Central South University of Forestry and Technology,School of Computer Science and Engineering, Central South University

基金: Supported by the National Natural Science Foundation of China under Grant No 61572529

分类号: TN722;O413;TN918.4

页码: 9-13

总页数: 5

文件大小: 1065K

下载量: 16

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