Free-Space distribution of entanglement and single photons over 144 km

  title={Free-Space distribution of entanglement and single photons over 144 km},
  author={Rupert Ursin and F. Tiefenbacher and Tobias Schmitt-Manderbach and Henning Weier and Thomas Scheidl and Michael Lindenthal and Bibiane Blauensteiner and Thomas Jennewein and Josep Perdigues and Pavel Trojek and B. Oemer and Martin Fuerst and Michael Meyenburg and John G. Rarity and Zoran Sodnik and Cesare Barbieri and Harald Weinfurter and Anton Zeilinger},
  journal={Nature Physics},
Quantum Entanglement is the essence of quantum physics and inspires fundamental questions about the principles of nature. Moreover it is also the basis for emerging technologies of quantum information processing such as quantum cryptography, quantum teleportation and quantum computation. Bell's discovery, that correlations measured on entangled quantum systems are at variance with a local realistic picture led to a flurry of experiments confirming the quantum predictions. However, it is still… 

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