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Long Distance Entangled State Quantum Key Distribution

  • Grégoire Ribordy
  • Nicolas Gisin
  • Hugo Zbinden

Abstract

A quantum key distribution system based on photon pairs entangled in energytime and optimized for long distance transmission is presented. It is based on a Franson arrangement for monitoring quantum correlations, and uses a protocol analogous to BB84. Passive state preparation is implemented by polarization multiplexing in the interferometers. We distributed a sifted key of 0.4 Mbits at a raw rate of 134 Hz and with an error rate of 8.6% over a distance of 8.5 kilometers.

Keywords

Quantum Communication Path Difference Photon Pair Interference Visibility Entangle Photon Pair 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Grégoire Ribordy
    • 1
  • Nicolas Gisin
    • 1
  • Hugo Zbinden
    • 1
  1. 1.Gap-OptiqueUniversité de GenèveGenève 4Switzerland

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