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Title: 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 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’.
Authors:
; ; ;  [1] ; ; ;  [2] ;  [3]
  1. Centre for Quantum Computation and Communication Technology, Department of Quantum Science, The Australian National University (Australia)
  2. Centre for Quantum Technologies, National University of Singapore (Singapore)
  3. Centre for Quantum Computation and Communication Technology, Department of Physics, University of Queensland (Australia)
Publication Date:
OSTI Identifier:
22390663
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1633; Journal Issue: 1; Conference: 11. International Conference on Quantum Communication, Measurement and Computation, Vienna (Austria), 30 Jul - 3 Aug 2012; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CORRELATIONS; DATA TRANSMISSION; LIMITING VALUES; QUANTUM ENTANGLEMENT; QUANTUM INFORMATION