基于MGC-LDPC码的连续变量量子密钥分配高效对调

IF 2.2 3区物理与天体物理 Q1 PHYSICS, MATHEMATICAL

Quantum Information Processing Pub Date : 2024-12-27 DOI:10.1007/s11128-024-04623-3

Siyu Jia, Han Hai, Xue-Qin Jiang, Shahid Mumtaz, Evangelos K. Markakis, Peng Huang

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引用次数: 0

摘要

提高连续变量量子密钥分发（CV-QKD）的协调效率和降低协调过程中的帧错误率可以提高CV-QKD的密钥率。本文将具有高纠错性能的matroshka全局耦合低密度奇偶校验码（MGC-LDPC）引入到CV-QKD中，以提高对调效率。为了降低误码率，我们提出了一种优化MGC-LDPC码对调过程的方法，从而提高了CV-QKD的密钥率。仿真实验表明，优化后的MGC-LDPC码可将CV-QKD的对调效率提高到98.39%，安全传输距离可扩展到190 km。

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High-efficiency reconciliation for continuous-variable quantum key distribution using MGC-LDPC codes

Increasing the reconciliation efficiency and decreasing the frame error rate (FER) during the reconciliation for continuous-variable quantum key distribution (CV-QKD) can improve the secret key rate of CV-QKD. In this paper, we introduce matryoshka globally coupled low-density parity-check (MGC-LDPC) codes with high error correction performance into CV-QKD to increase the reconciliation efficiency. To decrease the FER, we propose an optimization method for MGC-LDPC codes during the reconciliation, thus improving the secret key rate of CV-QKD. Simulation experiments show that the reconciliation efficiency of CV-QKD can be improved to 98.39% by using the optimized MGC-LDPC codes, and the secure transmission distance can be extended to 190 km.

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来源期刊

Quantum Information Processing 物理-物理：数学物理

CiteScore

4.10

自引率

20.00%

发文量

337

审稿时长

4.5 months

期刊介绍： Quantum Information Processing is a high-impact, international journal publishing cutting-edge experimental and theoretical research in all areas of Quantum Information Science. Topics of interest include quantum cryptography and communications, entanglement and discord, quantum algorithms, quantum error correction and fault tolerance, quantum computer science, quantum imaging and sensing, and experimental platforms for quantum information. Quantum Information Processing supports and inspires research by providing a comprehensive peer review process, and broadcasting high quality results in a range of formats. These include original papers, letters, broadly focused perspectives, comprehensive review articles, book reviews, and special topical issues. The journal is particularly interested in papers detailing and demonstrating quantum information protocols for cryptography, communications, computation, and sensing.