2022
DOI: 10.3390/e24101501
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Redundancy and Synergy of an Entangling Cloner in Continuous-Variable Quantum Communication

Abstract: We address minimization of information leakage from continuous-variable quantum channels. It is known, that regime of minimum leakage can be accessible for the modulated signal states with variance equivalent to a shot noise, i.e., vacuum fluctuations, in the case of collective attacks. Here we derive the same condition for the individual attacks and analytically study the properties of the mutual information quantities in and out of this regime. We show that in such regime a joint measurement on the modes of … Show more

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