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arXiv 2604.22232quant-ph
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关于噪声、贝尔违反和级联错误校正在设备无关量子密钥分发中的相互作用

A Simulation Framework for Noise and Error-Correction Analysis in Device-Independent Quantum Key Distribution

University of Information Technology, Ho Chi Minh City, Vietnam(胡志明市信息技术大学);Vietnam National University, Ho Chi Minh City, Vietnam(胡志明市越南国立大学);Faculty of Computer Science and Engineering, Thuyloi University, Hanoi, Vietnam(河内水利大学计算机科学与工程系);Nara Institute of Science and Technology, Nara, Japan(日本奈良先端科学技术大学院大学);Le Quy Don Technical University, Hanoi, Vietnam(河内黎贵敦技术大学)

Nguyen Duong Hoang Duy, Nguyen Trinh Dong, Vu Tuan Hai, Le Vu Trung Duong, Nguyen Van Tinh

AI总结:

研究噪声对CHSH值的影响及级联错误校正的有效性,提升DIQKD系统的纠错能力。

摘要:

设备无关量子密钥分发(DIQKD)通过仅依赖贝尔不等式违反来提供信息论安全,无需信任量子设备。然而,实际DIQKD实现对噪声非常敏感。高效经典后处理阶段的纠错对提高保真度至关重要。本文研究噪声对Clauser-Horne-Shimony-Holt(CHSH)值的影响,并评估级联错误校正的有效性。该协议通过奇偶校验和二进制搜索过程迭代纠正错误。模拟结果表明,噪声显著降低CHSH值,减少安全DIQKD所需的非本地相关性强度。然而,级联校正减少了错误率,大多数纠正发生在前几次轮次中。这些发现突显了经典纠错在提升DIQKD系统中的重要性。

英文摘要:

Device-Independent Quantum Key Distribution (DIQKD) certifies security from the violation of a Bell inequality alone, but its practical margin against noise is narrow and is usually quoted only through the Bell violation itself. We build a simulator of the event-ready DIQKD experiment and use it to trace readout noise through the Bell test into classical post-processing. For a symmetric outcome-flip channel of strength $e$, we reproduce the simulated violation window e<5.86%, to within $0.11$ percentage points. Combining these with a multi-pass Cascade reconciliation and the Devetak-Winter bound gives r<=0.162 bits per round, and shows that a positive key rate requires e<0.89 - roughly one-sixth of the window in which a Bell violation is still observed. The gap quantifies how far certified nonlocality overstates the usable noise budget of a DIQKD link.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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