The deployment of entangled photons for quantum cryptography

Andreas Poppe, Hannes Hübel, Bernhard Schrenk, Bibiane Blauensteiner, Michael Hentschel, Sven Ramelow, T Kelling, Anton Zeilinger

Publications: Contribution to journalArticlePeer Reviewed


Quantum cryptography is the first application of a real quantum technology to come on the market. The development is still largely performed in various research laboratories, however, commercialization on a larger scale is expected soon. Our aim is to use entanglement between photons as a quantum resource to form an "unconditional secure key" between communication partners. In this article we present for the first time the distribution of polarization entangled photons over long distances in optical fibers. The correlations are measured with such high quality that they are sufficient to extract a secure key.
Translated title of the contributionDer Einsatz Verschränkter Photonen für die Quantenkryptographie
Original languageEnglish
Pages (from-to)142-148
Number of pages7
JournalElektrotechnik und Informationstechnik
Issue number5
Publication statusPublished - 2007

Austrian Fields of Science 2012

  • 1030 Physics, Astronomy

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