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Q: Fachverband Quantenoptik und Photonik

Q 48: Quanteninformation (Quantenkommunikation)

Q 48.4: Talk

Thursday, March 13, 2008, 17:15–17:30, 1B

Continuous-variable quantum key distribution with qudits — •Ulrich Seyfarth and Gernot Alber — Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289, Darmstadt

A qudit generalization of the recently discussed two-state continuous-variable quantum key distribution protocol of Heid and Lütkenhaus [1] is presented. Secret key rates are evaluated for cases in which an eavesdropper can extract information by beam splitting attacks. Resulting key generation rates for direct and reverse reconciliation are compared.

[1] M. Heid and N. Lütkenhaus, Phys. Rev. A 73, 052316 (2006).