From the current edition of Nature, something really worth thinking about--the uses of quantum entanglement!!

Communications: Quantum teleportation across the Danube

RUPERT URSIN*, THOMAS JENNEWEIN*†, MARKUS ASPELMEYER*, RAINER KALTENBAEK*, MICHAEL LINDENTHAL*, PHILIP WALTHER* & ANTON ZEILINGER*†

* Institute for Experimental Physics, University of Vienna, 1090 Vienna, Austria
† Austrian Academy of Science, 1090 Vienna, Austria

rupert.ursin@univie.ac.at


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 worldwide scale.