2014/11/30 by Darius Bunandar, Zheshen Zhang, Jeffrey H. Shapiro +2
Computer Science · Medicine · Physics and Astronomy · #Computer science #Computer security #Decoy #Key (lock) #Medicine #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum key distribution #Quantum mechanics #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physreva.91.022336
published as Phys. Rev. A 91, 022336 (2015) · 11 pages, 3 figures
arxiv created 2015/02/26 · openalex publication_date 2015/02/27 · arxiv updated 2015/03/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
High-dimensional quantum key distribution (HD-QKD) allows two parties to generate multiple secure bits of information per detected photon. In this work, we show that decoy-state protocols can be practically implemented for HD-QKD using only one or two decoy states. HD-QKD with two decoy states, under realistic experimental constraints, can generate multiple secure bits per coincidence at distances over 200 km and at rates similar to those achieved by a protocol with infinite decoy states. Furthermore, HD-QKD with only one decoy state is practical at short distances, where it is almost as secure as a protocol with two decoy states. HD-QKD with only one or two decoy states can therefore be implemented to optimize the rate of secure quantum communications.