aiqbench analysis
This research introduces a simulation framework for Device-Independent Quantum Key Distribution (DIQKD) to rigorously analyze how readout noise impacts security margins and key generation rates. By quantifying the gap between observed Bell inequality violations and usable noise budgets, the study provides critical insights into the practical limits of DIQKD protocols before they become infeasible due to error accumulation.
A Simulation Framework for Noise and Error-Correction Analysis in Device-Independent Quantum Key Distribution
arXiv:2604.22232v2 Announce Type: replace Abstract: 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.
Abstract: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.
13 pages. This paper is submitted to SOICT2026
arXiv:2604.22232 [quant-ph]
(or arXiv:2604.22232v2 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2604.22232 Focus to learn more arXiv-issued DOI via DataCite
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Full text under the publisher's open licence · 228 words
