Communications: quantum teleportation across the Danube.
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.
Institute for Experimental Physics, University of Vienna, 1090 Vienna, Austria. rupert.ursin@univie.ac.at
Rupert
R
Ursin
Thomas
T
Jennewein
Markus
M
Aspelmeyer
Rainer
R
Kaltenbaek
Michael
M
Lindenthal
Philip
P
Walther
Anton
A
Zeilinger