High efficiency continuous-variable quantum key distribution based on QC-LDPC codes

被引：10

作者：

Guo, Ying ^{[1
]}

Wang, Kangshuai ^{[1
]}

Huang, Duan ^{[1
]}

Jiang, Xueqin ^{[2
]}

机构：

[1] Cent S Univ, Sch Comp Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Donghua Univ, Sch Informat Sci & Technol, Shanghai 201620, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2019年 / 17卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Additive white Gaussian noise channel - Binary inputs - Continuous variables - Error correcting code - Error-correcting - High-efficiency - Quasi cyclic low density parity check codes - Reconciliation process;

D O I：

10.3788/COL201917.112701

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Seeking good error correcting codes to improve the efficiency of continuous-variable quantum key distribution (CVQKD) reconciliation is a concerning issue. Due to the introduction of multidimensional reconciliation, the error correcting techniques in the classical binary-input additive white Gaussian noise channel are applicable to CVQKD. In this Letter, we apply the quasi-cyclic low-density parity-check (QC-LDPC) codes, which are specified in 5G protocol, to the reconciliation process. Simulation results show that the reconciliation efficiency can reach 92.6% when the code rate is 22/68 and the signal-to-noise ratio is 0.623. Such a new error correcting code points out a new direction for the development of CVQKD.

引用

页数：5

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