Nonlinear entanglement witnesses, covariance matrices and the geometry of separable states

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dc.creatorGühne, Otfried
dc.creatorLütkenhaus, Norbert
dc.date2006-12-13
dc.date.accessioned2026-07-07T08:09:41Z
dc.date.available2026-07-07T08:09:41Z
dc.descriptionEntanglement witnesses provide a standard tool for the analysis of entanglement in experiments. We investigate possible nonlinear entanglement witnesses from several perspectives. First, we demonstrate that they can be used to show that the set of separable states has no facets. Second, we give a new derivation of nonlinear witnesses based on covariance matrices. Finally, we investigate extensions to the multipartite case.
dc.description12 pages, 2 figures, for the proceedings of DICE2006 in Piombino (Italy)
dc.identifierhttps://arxiv.org/abs/quant-ph/0612108
dc.identifierhttp://arxiv.org/abs/quant-ph/0612108
dc.identifierJ. Phys.: Conf. Ser. 67, 012004 (2007)
dc.identifierdoi:10.1088/1742-6596/67/1/012004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/131613
dc.subjectQuantum Physics
dc.titleNonlinear entanglement witnesses, covariance matrices and the geometry of separable states
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