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Q: Fachverband Quantenoptik und Photonik

Q 54: Poster 3

Q 54.5: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II

Long distance QKD enhanced by quantum repeaters with linear optics. — •Silvestre Abruzzo, Hermann Kampermann, and Dagmar Bruß — Heinrich-Heine-Universität Düsseldorf, Institut für Theoretische Physik III, Düsseldorf, Germany

In this work we analyze and characterize a generic quantum repeater[1] architecture based on dual-rail entanglement, heralding and entanglement swapping with linear optics and quantum memories. We calculate the asymptotic secret key rate and we show its dependency on the experimental parameters describing the proposed quantum repeater. This will permit us to bound and to estimate the requirements on the imperfections of the experimental set-up.

[1] H. J. Briegel et al., Phys. Rev. Lett. 81, 5932-5935 (1998).