Determining lower bounds on a measure of multipartite entanglement from few local observables

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Title:	Determining lower bounds on a measure of multipartite entanglement from few local observables
Authors:	Wu, Jun-Yi;Kampermann, Hermann;Bruß, Dagmar;Klöckl, Claude;Huber, Marcus
Date:	2012-08-17
Issue Date:	2021-04-22 12:10:21 (UTC+8)
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.
Relation:	Phys. Rev. A 86(2), 022319
DOI:	10.1103/physreva.86.022319
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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