2006/08/31 by Matthias Heid, Norbert Lütkenhaus · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Coherent states #Computer science #Computer security #Cryptography #Gaussian #Gaussian noise #Key (lock) #Lossy compression #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum cryptography #Quantum information #Quantum key distribution #Quantum mechanics #Statistical physics #Theoretical computer science #Topology (electrical circuits) #quant-ph
paper · pdf · doi:10.1103/physreva.76.022313
published as Phys. Rev. A, 76, 022313 (2007) · 12 pages, 5 figures updated version including two-way communication; changed the definition of the excess noise to match the definition given earlier (Phys. Rev. Lett. 92, 117901); submitted to PRA; presented at the 8th International Conference on Quantum Communication, Measurement and Computing, Tsukuba
arxiv created 2007/04/19 · openalex publication_date 2007/08/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the security against collective attacks of a continuous variable quantum key distribution scheme in the asymptotic key limit for a realistic setting. The quantum channel connecting the two honest parties is assumed to be lossy and imposes Gaussian noise on the observed quadrature distributions. Secret key rates are given for direct and reverse reconciliation schemes including post-selection in the collective attack scenario. The effect of a nonideal error correction and two-way communication in the classical post-processing step is also taken into account.