Appending Information Reconciliation for Quantum Key Distribution

Information reconciliation (IR), which corrects the errors in the sifted keys, directly determines the secure key rate and the link distance of quantum key distribution (QKD) systems. In this article, we propose an appending information reconciliation (AIR) scheme based on polar codes, which achieve...

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Bibliographic Details
Published in:arXiv.org 2022-04
Main Authors: Zhou, Han, Bang-Ying, Tang, Chen, Huan, Hui-Cun Yu, Si-Chen, Li, Wan-Rong, Yu, Liu, Bo
Format: Article
Language:English
Subjects:
Bit error rate
Efficiency
Quantum cryptography
Qubits (quantum computing)
Reconciliation
Online Access:Get full text
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Summary:Information reconciliation (IR), which corrects the errors in the sifted keys, directly determines the secure key rate and the link distance of quantum key distribution (QKD) systems. In this article, we propose an appending information reconciliation (AIR) scheme based on polar codes, which achieves high efficiency and ultra-low failure probability simultaneously, by gradually disclosing the bit values of the polarized channels with high error probability. The experimental results show that the efficiency of the proposed AIR scheme is closer to the Shannon limit, compared with the state-of-the-art implemented polar codes-based IR schemes, with the overall failure probability around 1E-8, especially when performed with smaller block sizes. Moreover, the efficiency of the proposed AIR scheme is 1.046, when the block size is 1 Gb and the quantum bit error rate of 0.02. Therefore, the proposed AIR scheme can further eradicate the performance gap between theory and implementation for QKD systems.
ISSN:2331-8422