Continuous-variable Quantum Key Distribution protocols with a discrete modulation

Abstract

In this paper, we consider continuous-variable quantum key distribution with a discrete modulation, either binary or quaternary. We establish the security of these protocols against the class of collective attacks that induce a linear quantum channel. In particular, all Gaussian attacks are taken into account, as well as linear attacks which add a non-Gaussian noise. We give lower bounds for the secret key rate using extremality properties of Gaussian states.

23 pages, 9 figures

References in corpus (2)

• Continuous-variable quantum key distribution protocols with a non-Gaussian modulation
• Long distance quantum key distribution with continuous variables

Cited by in corpus (7)

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• Probabilistic amplitude shaping for continuous-variable quantum key distribution with discrete modulation over a wiretap channel
• Long distance quantum key distribution with continuous variables
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