Discord as a quantum resource for bi-partite communication

Discord as a quantum resource for bi-partite communication

Coherent interactions that generate negligible entanglement can still exhibit unique quantum behaviour. This observation has motivated a search beyond entanglement for a complete description of all quantum correlations. Quantum discord is a promising candidate. Here, we experimentally demonstrate th...

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Bibliographic Details
Main Authors: Chrzanowski, H, Gu, M, Assad, S, Symul, T, Modi, K, Ralph, T, Vedral, V, Lam, P
Format: Conference item
Published: American Institute of Physics Inc. 2014
Description
Summary:Coherent interactions that generate negligible entanglement can still exhibit unique quantum behaviour. This observation has motivated a search beyond entanglement for a complete description of all quantum correlations. Quantum discord is a promising candidate. Here, we experimentally demonstrate that under certain measurement constraints, discord between bipartite systems can be consumed to encode information that can only be accessed by coherent quantum interactions. The inability to access this information by any other means allows us to use discord to directly quantify this 'quantum advantage'.

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