Discord as a quantum resource for bi-partite communication | Zendy

Helen M. Chrzanowski | Zendy; Mile Gu | Zendy; Syed M. Assad | Zendy; Thomas Symul | Zendy; Kavan Modi | Zendy; Timothy C. Ralph | Zendy; Vlatko Vedral | Zendy; Ping Koy Lam | Zendy

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Discord as a quantum resource for bi-partite communication

Author(s) -

Helen M. Chrzanowski,

Mile Gu,

Syed M. Assad,

Thomas Symul,

Kavan Modi,

Timothy C. Ralph,

Vlatko Vedral,

Ping Koy Lam

Publication year - 2014

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.4903110

Subject(s) - quantum entanglement , quantum discord , bipartite graph , encode , quantum , computer science , quantum information , theoretical computer science , physics , quantum mechanics , biology , genetics , graph , gene

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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