Definition
In quantum information theory, quantum discord is a measure of nonclassical correlations between two subsystems of a quantum system. It includes correlations that are due to quantum physical effects but do not necessarily involve quantum entanglement.
Related concepts
Annalen der PhysikCarlton M. CavesChloroformClassical limitCoherence (physics)Concurrence (quantum computing)Conditional entropyConditional quantum entropyDensity matrixHeat reservoirInformation entropyJoint entropyJoint quantum entropyJournal of Physics AMatrix factorizationMaxwell's demonMutual informationNuclear magnetic resonanceObservableOpen quantum systemPeres–Horodecki criterionPhysOrgPhysical Review APhysical Review LettersPointer stateProjective Hilbert spacePure stateQuantum computationQuantum decoherenceQuantum entanglementQuantum information theoryQuantum key distributionQuantum measurementQuantum mechanicsQuantum mutual informationQuantum phase transitionQuantum stateQuantum statistical mechanicsQuantum systemQuantum tomographyQubitSeparable statesState-mergingStatistical ensembleThermal equilibriumUnruh effectVlatko VedralVon Neumann entropyWojciech H. Zurek
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