2017/07/31 by Marco Cattaneo, Matteo G. A. Paris, Stefano Olivares · 39 citations
Computer Science · Mathematics · Physics and Astronomy · #Coherent states #Computer science #Computer security #Continuous variable #Detector #Direct-conversion receiver #Gaussian #Homodyne detection #Key (lock) #Mathematics #Optics #Photon #Physics #Protocol (science) #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum key distribution #Quantum mechanics #Statistical physics #Statistics #quant-ph
paper · pdf · doi:10.1103/physreva.98.012333
published in Physical Review A 98(1) (American Physical Society) · 5 pages, 5 figures. We extended our analysis to reverse reconciliation and to collective attacks
openalex created_date 2017/07/21 · arxiv created 2018/03/23 · openalex publication_date 2018/07/30 · arxiv updated 2018/08/08 · openalex updated_date 2026/08/05
We put forward a hybrid quantum key distribution protocol based on coherent states, Gaussian modulation, and photon-number-resolving (PNR) detectors, and show that it may enhance the secret key generation rate (KGR) compared to homodyne-based schemes. Improvement in the KGR may be traced back to the dependence of the two-dimensional discrete output variable on both the input quadratures, thus overcoming the limitations of the original protocol. When reverse reconciliation is considered, the scheme based on PNR detectors outperforms the homodyne one both for individual and collective attacks. In the presence of direct reconciliation, the PNR strategy is still the best one against individual attacks, but for the collective ones the homodyne-based scheme is still to be preferred as the channel transmissivity decreases.