Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 28: Quantum Information: Quantum Communication 1

Q 28.8: Vortrag

Mittwoch, 16. März 2011, 12:15–12:30, SCH A01

Secret key rates in quantum key distribution using optimization of Rényi entropies — •Silvestre Abruzzo, Markus Mertz, Hermann Kampermann, and Dagmar Bruss — Heinrich-Heine-Universität Düsseldorf, Institut für Theoretische Physik III, Düsseldorf, Germany

The analysis of a quantum key distribution(QKD) protocol considering finite resources is a new research field. In this talk we will present a new bound for the secret key rate based on the optimization of Rényi entropies, and we will show how to estimate it for finite number of signals. We will explicitly calculate this bound for the symmetric six-state protocol and show that in comparison with other relevant approaches it leads to higher key rates.