English

Witnessing genuine multipartite entanglement with positive maps

Quantum Physics 2014-09-10 v2

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.

Keywords

Cite

@article{arxiv.1404.7449,
  title  = {Witnessing genuine multipartite entanglement with positive maps},
  author = {Marcus Huber and Ritabrata Sengupta},
  journal= {arXiv preprint arXiv:1404.7449},
  year   = {2014}
}

Comments

4 pages, 1 figure, this time the correct file and some last minute comments included