2008/06/30 by Raúl García−Patrón, Raul Garcia-Patron, Nicolas J. Cerf · 5 citations
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Artificial intelligence #Channel (broadcasting) #Computer science #Computer security #Continuous variable #Cryptography #Gaussian #Gaussian noise #Key (lock) #Key generation #Mathematics #Noise (video) #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 #Telecommunications #Topology (electrical circuits) #Variable (mathematics) #quant-ph
paper · pdf · doi:10.1103/physrevlett.102.130501
published as Phys. Rev. Lett. 102, 130501 (2009) · Minor modifications to match published manuscript
openalex publication_date 2009/03/31 · arxiv created 2009/06/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A continuous-variable quantum key distribution protocol based on squeezed states and heterodyne detection is introduced and shown to attain higher secret key rates over a noisy line than any other one-way Gaussian protocol. This increased resistance to channel noise can be understood as resulting from purposely adding noise to the signal that is converted into the secret key. This notion of noise-enhanced tolerance to noise also provides a better physical insight into the poorly understood discrepancies between the previously defined families of Gaussian protocols.