Hybrid quantum key distribution using coherent states and photon-number-resolving detectors
Articolo
Data di Pubblicazione:
2018
Citazione:
Hybrid quantum key distribution using coherent states and photon-number-resolving detectors / M. Cattaneo, M.G.A. Paris, S. Olivares. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 98:1(2018). [10.1103/PhysRevA.98.012333]
Abstract:
We put forward a hybrid quantum key distribution protocol based on coherent states, Gaussian modulation, and photon-number-resolving (PNR) detectors, and show that it may enhance the secret key generation rate (KGR) compared to homodyne-based schemes. Improvement in the KGR may be traced back to the dependence of the two-dimensional discrete output variable on both the input quadratures, thus overcoming the limitations of the original protocol. When reverse reconciliation is considered, the scheme based on PNR detectors outperforms the homodyne one both for individual and collective attacks. In the presence of direct reconciliation, the PNR strategy is still the best one against individual attacks, but for the collective ones the homodyne-based scheme is still to be preferred as the channel transmissivity decreases.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
quantum communication; quantum key deistribution; photon number resolving detectors
Elenco autori:
M. Cattaneo, M.G.A. Paris, S. Olivares
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