Brief Communications

Nature 430, 849 (19 August 2004) | doi:10.1038/430849a; Published online 18 August 2004

Communications:  Quantum teleportation across the Danube

Rupert Ursin1, Thomas Jennewein1,2, Markus Aspelmeyer1, Rainer Kaltenbaek1, Michael Lindenthal1, Philip Walther1 & Anton Zeilinger1,2

Efficient long-distance quantum teleportation1 is crucial for quantum communication and quantum networking schemes2. Here we describe the high-fidelity teleportation of photons over a distance of 600 metres across the River Danube in Vienna, with the optimal efficiency that can be achieved using linear optics. Our result is a step towards the implementation of a quantum repeater3, which will enable pure entanglement to be shared between distant parties in a public environment and eventually on a worldwide scale.

  1. Institute for Experimental Physics, University of Vienna, 1090 Vienna, Austria
  2. Austrian Academy of Science, 1090 Vienna, Austria

Correspondence to: Rupert Ursin1 Email:


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