Communications: Quantum teleportation across the Danube

@article{Ursin2004CommunicationsQT,
  title={Communications: Quantum teleportation across the Danube},
  author={Rupert Ursin and Thomas Jennewein and Markus Aspelmeyer and Rainer Kaltenbaek and Michael Lindenthal and Philip Walther and Anton Zeilinger},
  journal={Nature},
  year={2004},
  volume={430},
  pages={849-849}
}
Efficient long-distance quantum teleportation is crucial for quantum communication and quantum networking schemes. 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 repeater, which will enable pure entanglement to be shared between distant parties in a public environment and eventually on a… 

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