How to observe and quantify quantum-discord states via correlations Article Swipe
Matthew A. Hunt
,
Igor V. Lerner
,
I. V. Yurkevich
,
Yuval Gefen
·
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1103/physreva.100.022321
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1103/physreva.100.022321
Quantum correlations between parts of a composite system most clearly reveal\nthemselves through entanglement. Designing, maintaining, and controlling\nentangled systems is very demanding, which raises the stakes for understanding\nthe efficacy of entanglement-free, yet quantum, correlations, exemplified by\nquantum discord. Discord is defined via conditional mutual entropies of parts\nof a composite system, and its direct measurement is hardly possible even via\nfull tomographic characterization of the system state. Here we design a simple\nprotocol to detect quantum discord and characterize a discorded state in an\nunentangled bipartite system. Our protocol is based on an electronic setup and\nrelies on a characteristic of discord that can be extracted from repeated\ndirect measurements of current correlations between subsystems. The proposed\nprotocol opens a way of extending experimental studies of discord to many-body\ncondensed matter systems.\n
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1103/physreva.100.022321
- http://link.aps.org/pdf/10.1103/PhysRevA.100.022321
- OA Status
- bronze
- Cited By
- 12
- References
- 32
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2912568143
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2912568143Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1103/physreva.100.022321Digital Object Identifier
- Title
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How to observe and quantify quantum-discord states via correlationsWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2019Year of publication
- Publication date
-
2019-08-16Full publication date if available
- Authors
-
Matthew A. Hunt, Igor V. Lerner, I. V. Yurkevich, Yuval GefenList of authors in order
- Landing page
-
https://doi.org/10.1103/physreva.100.022321Publisher landing page
- PDF URL
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https://link.aps.org/pdf/10.1103/PhysRevA.100.022321Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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bronzeOpen access status per OpenAlex
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https://link.aps.org/pdf/10.1103/PhysRevA.100.022321Direct OA link when available
- Concepts
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Quantum discord, Quantum entanglement, Quantum, Bipartite graph, Protocol (science), Statistical physics, Quantum system, Computer science, Quantum correlation, Physics, Quantum mechanics, Mathematics, Theoretical computer science, Medicine, Pathology, Graph, Alternative medicineTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
12Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 1, 2024: 2, 2023: 1, 2022: 4, 2021: 1Per-year citation counts (last 5 years)
- References (count)
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32Number of works referenced by this work
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-
10Other works algorithmically related by OpenAlex
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