Chinese Optics Letters, 2019, 17 (11): 112701, Published Online: Sep. 16, 2019
High efficiency continuous-variable quantum key distribution based on QC-LDPC codes Download: 681次
270.5565 Quantum communications 270.5568 Quantum cryptography 270.5585 Quantum information and processing
Abstract
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.
Ying Guo, Kangshuai Wang, Duan Huang, Xueqin Jiang. High efficiency continuous-variable quantum key distribution based on QC-LDPC codes[J]. Chinese Optics Letters, 2019, 17(11): 112701.