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