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Q: Quantenoptik und Photonik

Q 11: Quantenkommunikation I

Q 11.3: Talk

Saturday, March 5, 2005, 09:00–09:15, HU Audimax

Long-distance quantum teleportation with active unitary — •Rupert Ursin, Thomas Jennewein, Markus Aspelmeyer, Rainer Kaltenbaek, Michael Lindenthal, Philip Walther, and Anton Zeilinger — Institut für Experimentalphysik, Universität Wien

We present a high fidelity, long-distance real-world quantum teleportation experiment across the River Danube in Vienna between two laboratories separated by 600m. Our scheme combines for the first time a more complete Bell-state measurement with an actively triggered unitary transformation depending on its outcome and achieves optimum teleportation efficiency achievable with linear optics alone. Our system is a leap towards a real-world implementation of a quantum repeater scheme.