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Quantum Information Processing

Erschienen in:

01.02.2016

Quantum key distribution using continuous-variable non-Gaussian states

verfasst von: L. F. M. Borelli, L. S. Aguiar, J. A. Roversi, A. Vidiella-Barranco

Erschienen in: Quantum Information Processing | Ausgabe 2/2016

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Abstract

In this work, we present a quantum key distribution protocol using continuous-variable non-Gaussian states, homodyne detection and post-selection. The employed signal states are the photon added then subtracted coherent states (PASCS) in which one photon is added and subsequently one photon is subtracted from the field. We analyze the performance of our protocol, compared with a coherent state-based protocol, for two different attacks that could be carried out by the eavesdropper (Eve). We calculate the secret key rate transmission in a lossy line for a superior channel (beam-splitter) attack, and we show that we may increase the secret key generation rate by using the non-Gaussian PASCS rather than coherent states. We also consider the simultaneous quadrature measurement (intercept-resend) attack, and we show that the efficiency of Eve’s attack is substantially reduced if PASCS are used as signal states.

Vorheriger Artikel Four-state quantum key distribution exploiting maximum mutual information measurement strategy

Nächster Artikel Bidirectional teleportation of a pure EPR state by using GHZ states

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Titel: Quantum key distribution using continuous-variable non-Gaussian states
verfasst von: L. F. M. Borelli
L. S. Aguiar
J. A. Roversi
A. Vidiella-Barranco
Publikationsdatum: 01.02.2016
Verlag: Springer US
Erschienen in: Quantum Information Processing / Ausgabe 2/2016
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-015-1193-8

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