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• W2912568143 abstract "Quantum correlations between parts of a composite system most clearly reveal themselves through entanglement. Designing, maintaining, and controlling entangled systems is very demanding, which raises the stakes for understanding the efficacy of entanglement-free, yet quantum, correlations, exemplified by quantum discord. Discord is defined via conditional mutual entropies of parts of a composite system, and its direct measurement is hardly possible even via full tomographic characterization of the system state. Here we design a simple protocol to detect quantum discord and characterize a discorded state in an unentangled bipartite system. Our protocol is based on an electronic setup and relies on a characteristic of discord that can be extracted from repeated direct measurements of current correlations between subsystems. The proposed protocol opens a way of extending experimental studies of discord to many-body condensed matter systems." @default.
• W2912568143 created "2019-02-21" @default.
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• W2912568143 date "2019-08-16" @default.
• W2912568143 modified "2023-10-14" @default.
• W2912568143 title "How to observe and quantify quantum-discord states via correlations" @default.
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• W2912568143 doi "https://doi.org/10.1103/physreva.100.022321" @default.
• W2912568143 hasPublicationYear "2019" @default.
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