Quantum Discord as Optimal Resource for Quantum Communication

Borivoje Dakic1†, Yannick Ole Lipp1†, Xiaosong Ma2,3†, Martin Ringbauer1†, Sebastian Kropatschek3, Stefanie Barz2, Tomasz Paterek4, Vlatko Vedral4,5, Anton Zeilinger2,3, Caslav Brukner1,3 & Philip Walther1,3 1 Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria. 2 Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria. 3 Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria. 4 Centre for Quantum Technologies, National University of Singapore, Block S15, 3 Science Drive 2, 117543 Singapore. 5 Department of Atomic and Laser Physics, University of Oxford, Oxford OX1 3PU, UK. † These authors contributed equally to this work (listed alphabetically). (Dated: March 9, 2012)

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