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Quantum key distribution with continuous variables

Bencheikh, K; Symul, Thomas; Jankovic, A; Levenson, J A


We study a new quantum cryptography protocol with continuous variables for the construction of secret quantum keys. The protocol is based on pairs of Einstein-Podolsky-Rosen entangled quadratures of a two-mode electromagnetic field generated by non-degenerate parametric amplification. Instantaneous measurements of the quantum fluctuations provide the random bits of the secret key. The irreversible alteration of the quadrature entanglement due to unauthorized measurements immunizes the quantum...[Show more]

CollectionsANU Research Publications
Date published: 2001
Type: Journal article
Source: Journal of Modern Optics
DOI: 10.1080/09500340110075122


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