Application of practical noiseless linear amplifier in no-switching continuous-variable quantum cryptography

Application of practical noiseless linear amplifier in no-switching continuous-variable quantum... We propose a modified no-switching continuous-variable quantum key distribution protocol by employing a practical noiseless linear amplifier at the receiver to increase the maximal transmission distance and tolerable excess noise. A security analysis is presented to derive the secure bound of the protocol in presence of a Gaussian noisy lossy channel. Simulation results show that the modified protocol can not only transmit longer distance and tolerate more channel excess noise than the original protocol, but also distribute more secure keys in the enhanced region where we define a critical point to separate the enhanced and degenerative region. This critical point presents the condition of using a practical noiseless linear amplifier in the no-switching continuous-variable quantum cryptography, which is meaningful and instructive to implement a practical experiment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Application of practical noiseless linear amplifier in no-switching continuous-variable quantum cryptography

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Publisher
Springer US
Copyright
Copyright © 2015 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-015-1095-9
Publisher site
See Article on Publisher Site

Abstract

We propose a modified no-switching continuous-variable quantum key distribution protocol by employing a practical noiseless linear amplifier at the receiver to increase the maximal transmission distance and tolerable excess noise. A security analysis is presented to derive the secure bound of the protocol in presence of a Gaussian noisy lossy channel. Simulation results show that the modified protocol can not only transmit longer distance and tolerate more channel excess noise than the original protocol, but also distribute more secure keys in the enhanced region where we define a critical point to separate the enhanced and degenerative region. This critical point presents the condition of using a practical noiseless linear amplifier in the no-switching continuous-variable quantum cryptography, which is meaningful and instructive to implement a practical experiment.

Journal

Quantum Information ProcessingSpringer Journals

Published: Sep 16, 2015

References

  • Security of continuous-variable quantum key distribution against general attacks
    Leverrier, A; García-Patrón, R; Renner, R; Cerf, NJ
  • Quantum limits on probabilistic amplifiers
    Pandey, S; Jiang, Z; Combes, J; Caves, CM
  • Optimal design and quantum benchmarks for coherent state amplifiers
    Chiribella, G; Xie, J
  • Optimal architecture for a nondeterministic noiseless linear amplifier
    McMahon, NA; Lund, AP; Ralph, TC
  • Improving the maximum transmission distance of continuous-variable quantum key distribution using a noiseless amplifier
    Blandino, R; Leverrier, A; Barbieri, M; Etesse, J; Grangier, P; Tualle-Brouri, R
  • Security of continuous-variable quantum cryptography with gaussian postselection
    Walk, N; Ralph, TC; Symul, T; Lam, PK

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