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Operational interpretations of quantum discord

Cavalcanti, D. ; Aolita, L. ; Boixo, S. ; Modi, K. ; Piani, M. ; Winter, A.

Physical review. A, Atomic, molecular, and optical physics, 2011-03, Vol.83 (3), Article 032324

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Título:
Operational interpretations of quantum discord
Autor: Cavalcanti, D. ; Aolita, L. ; Boixo, S. ; Modi, K. ; Piani, M. ; Winter, A.
Assuntos: ASYMMETRY ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; CORRELATIONS ; INFORMATION ; QUANTUM ENTANGLEMENT ; QUANTUM STATES
É parte de: Physical review. A, Atomic, molecular, and optical physics, 2011-03, Vol.83 (3), Article 032324
Descrição: Quantum discord quantifies nonclassical correlations beyond the standard classification of quantum states into entangled and unentangled. Although it has received considerable attention, it still lacks any precise interpretation in terms of some protocol in which quantum features are relevant. Here we give quantum discord its first information-theoretic operational meaning in terms of entanglement consumption in an extended quantum-state-merging protocol. We further relate the asymmetry of quantum discord with the performance imbalance in quantum state merging and dense coding.
Editor: United States
Idioma: Inglês

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