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Experimental demonstration of post-selection-based continuous-variable quantum key distribution in the presence of Gaussian noise

Symul, Thomas; Alton, Daniel; Assad, Syed; Lance, Andrew; Weedbrook, C; Ralph, Timothy Cameron; Lam, Ping Koy


In realistic continuous-variable quantum key distribution protocols, an eavesdropper may exploit the additional Gaussian noise generated during transmission to mask her presence. We present a theoretical framework for a post-selection-based protocol which explicitly takes into account excess Gaussian noise. We derive a quantitative expression of the secret key rates based on the Levitin and Holevo bounds. We experimentally demonstrate that the post-selection-based scheme is still secure against...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Physical Review A: Atomic, Molecular and Optical Physics
DOI: 10.1103/PhysRevA.76.030303


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