2017/03/11 by Jian-Rong Zhu, Jianrong Zhu, Chunmei Zhang +3 · 9 citations
Computer Science · Mathematics · Physics and Astronomy · #Basis (linear algebra) #Distribution (mathematics) #Fraction (chemistry) #Key (lock) #Mathematical Analysis and Transform Methods #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum cryptography #Quantum key distribution #Scheme (mathematics) #Transmission (telecommunications) #quant-ph
paper · pdf · doi:10.1140/epjd/e2017-80219-2
published in The European Physical Journal D 71(12) (Springer Science+Business Media) · 9pages, 3 figures
arxiv created 2017/03/11 · openalex created_date 2017/03/23 · openalex publication_date 2017/12/01 · arxiv updated 2017/12/15 · openalex updated_date 2026/08/05
Without actively aligning the reference frames, the reference-frame-independent quantum key distribution (RFI-QKD) can generate secure keys even when the reference frames drift slowly. Here, we propose a new scheme on the decoy-state RFI-QKD, where the basis assignments of two legitimate parties are biased, reducing the fraction of mismatched-basis data. When accounting for statistical fluctuations under different misalignments of reference frames, we investigate the performance of biased decoy-state RFI-QKD with full parameter optimization. We also make a clear comparison between the new scheme with other practical schemes, e.g., unbiased decoy-state RFI-QKD and biased decoy-state BB84-QKD. Simulation results demonstrate that the new proposed biased decoy-state RFI-QKD can significantly improve the performance (secret key rate and secure transmission distance) of practical QKD systems.