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Correlations between outcomes of random measurements
- Autor(en)
- Minh Cong Tran, Borivoje Dakic, Wieslaw Laskowski, Tomasz Paterek
- Abstrakt
We recently showed that multipartite correlations between outcomes of random observables detect quantum entanglement in all pure and some mixed states. In this followup article we further develop this approach, derive a maximal amount of such correlations, and show that they are not monotonous under local operations and classical communication. Nevertheless, we demonstrate their usefulness in entanglement detection with a single random observable per party. Finally we study convex-roof extension of the correlations and provide a closed-form necessary and sufficient condition for entanglement in rank-2 mixed states and a witness in general.
- Organisation(en)
- Quantenoptik, Quantennanophysik und Quanteninformation
- Externe Organisation(en)
- Nanyang Technological University (NTU), University of Maryland, College Park, Österreichische Akademie der Wissenschaften (ÖAW), University of Gdańsk, National University of Singapore (NUS)
- Journal
- Physical Review A
- Band
- 94
- Anzahl der Seiten
- 9
- ISSN
- 1050-2947
- DOI
- https://doi.org/10.1103/PhysRevA.94.042302
- Publikationsdatum
- 10-2016
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103025 Quantenmechanik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Atomic and Molecular Physics, and Optics
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/d5ea3bad-4124-4ae3-848a-7e0737f51c91