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 5 G 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.
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 5 G 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.
作者
Ying Guo
Kangshuai Wang
Duan Huang
Xueqin Jiang
郭迎;汪康帅;黄端;蒋学芹(School of Computer Science and Engineering,Central South University,Changsha 410083,China;School of Information Science and Technology,Donghua University,Shanghai 201620,China)
基金
supported by the National Natural Science Foundation of China(Nos.61801522 and 61871407)
