Phase-error-estimation security framework for quantum key distribution with correlated sources
Year: 2026
Type: article
Abstract: Practical quantum key distribution (QKD) modulators introduce correlations between consecutively emitted pulses due to bandwidth limitations, violating key assumptions underlying many security proof techniques. Here, we address this problem by introducing a simple yet powerful mathematical framework to directly extend phase-error-estimation-based security proofs for imperfect but uncorrelated sources to also incorporate encoding correlations. Our framework overcomes important limitations of previous approaches in terms of generality and rigor, significantly narrowing the gap between theoretical security guarantees and real-world QKD implementations.
Source: Physical Review Research
DOI: 10.1103/tkx1-23xz
Institutions: Universidade de Vigo, University of Toyama
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Funders: European Commission, Ministerio de Economía y Competitividad, Atlantic Research Center for Information and Communication Technologies, HORIZON EUROPE Framework Programme, Japan Society for the Promotion of Science, European Regional Development Fund, Interreg, HORIZON EUROPE Marie Sklodowska-Curie Actions
Awards: G1424224791, 量子暗号の実装安全性保証, Quantum technology components for space communication, G3990393904, G4492039195, G5602316953, Enhancing the implementation security of quantum key distribution, G6251103608, G675437911, G6796242504, G7075478681, G7799207878, G8120592908, G8436342288, Quantum Secure Networks Partnership
OpenAlex ID: W7202118699