Practical high-dimensional quantum key distribution with decoy states
Author(s)
Bunandar, Darius; Zhang, Zheshen; Shapiro, Jeffrey H.; Englund, Dirk Robert
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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.
Date issued
2015-02Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of ElectronicsJournal
Physical Review A
Publisher
American Physical Society
Citation
Bunandar, Darius, Zheshen Zhang, Jeffrey H. Shapiro, and Dirk R. Englund. “Practical High-Dimensional Quantum Key Distribution with Decoy States.” Phys. Rev. A 91, no. 2 (February 2015). © 2015 American Physical Society
Version: Final published version
ISSN
1050-2947
1094-1622