Determining lower bounds on a measure of multipartite entanglement from few local observables
Quantum Physics
2012-08-21 v2
Abstract
We introduce a method to lower bound an entropy-based measure of genuine multipartite entanglement via nonlinear entanglement witnesses. We show that some of these bounds are tight and explicitly work out their connection to a framework of nonlinear witnesses that were published recently. Furthermore we provide a detailed analysis of these lower bounds in the context of other possible bounds and measures. In exemplary cases we show that only a few local measurements are necessary to determine these lower bounds.
Keywords
Cite
@article{arxiv.1205.3119,
title = {Determining lower bounds on a measure of multipartite entanglement from few local observables},
author = {Jun-Yi Wu and Hermann Kampermann and Dagmar Bruß and Claude Klöckl and Marcus Huber},
journal= {arXiv preprint arXiv:1205.3119},
year = {2012}
}
Comments
11 pages, 2 figures