Witnessing Genuine Multipartite Entanglement with Positive Maps

TitleWitnessing Genuine Multipartite Entanglement with Positive Maps
Publication TypeJournal Article
Year of Publication2014
AuthorsHuber, M, Sengupta, R
JournalPhysical Review Letters
Volume113
Date Published9/2014
ISSN1079-7114
Abstract

We derive a general framework that connects every positive map with a corresponding witness for partial separability in multipartite quantum systems. We show that many previous approaches were intimately connected to the witnesses derived from partial transposition and that such criteria can easily be outperformed in higher dimensions by non-decomposable maps. As an exemplary case we present a witness that is capable of detecting genuine multipartite entanglement in bound entangled states.

DOI10.1103/PhysRevLett.113.100501
Short TitlePhys. Rev. Lett.
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