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Proceedings Paper

Coherent one-way quantum key distribution
Author(s): Damien Stucki; Sylvain Fasel; Nicolas Gisin; Yann Thoma; Hugo Zbinden
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Paper Abstract

Quantum Key Distribution (QKD) consists in the exchange of a secrete key between two distant points [1]. Even if quantum key distribution systems exist and commercial systems are reaching the market [2], there are still improvements to be made: simplify the construction of the system; increase the secret key rate. To this end, we present a new protocol for QKD tailored to work with weak coherent pulses and at high bit rates [3]. The advantages of this system are that the setup is experimentally simple and it is tolerant to reduced interference visibility and to photon number splitting attacks, thus resulting in a high efficiency in terms of distilled secret bits per qubit. After having successfully tested the feasibility of the system [3], we are currently developing a fully integrated and automated prototype within the SECOQC project [4]. We present the latest results using the prototype. We also discuss the issue of the photon detection, which still remains the bottleneck for QKD.

Paper Details

Date Published: 11 May 2007
PDF: 4 pages
Proc. SPIE 6583, Photon Counting Applications, Quantum Optics, and Quantum Cryptography, 65830L (11 May 2007); doi: 10.1117/12.722952
Show Author Affiliations
Damien Stucki, Univ. de Genève (Switzerland)
Sylvain Fasel, Univ. de Genève (Switzerland)
Nicolas Gisin, Univ. de Genève (Switzerland)
Yann Thoma, Univ. de Genève (Switzerland)
Hugo Zbinden, Univ. de Genève (Switzerland)

Published in SPIE Proceedings Vol. 6583:
Photon Counting Applications, Quantum Optics, and Quantum Cryptography
Miloslav Dusek; Ivan Prochazka; Mark S. Hillery; Alan L. Migdall; Wolfgang P. Schleich; Alexandre Pauchard, Editor(s)

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