Covariance matrices and the separability problem

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dc.creatorGühne, O.
dc.creatorHyllus, P.
dc.creatorGittsovich, O.
dc.creatorEisert, J.
dc.date2006-11-29
dc.date2007-08-04
dc.date.accessioned2026-07-07T08:33:38Z
dc.date.available2026-07-07T08:33:38Z
dc.descriptionWe propose a unifying approach to the separability problem using covariance matrices of locally measurable observables. From a practical point of view, our approach leads to strong entanglement criteria that allow to detect the entanglement of many bound entangled states in higher dimensions and which are at the same time necessary and sufficient for two qubits. From a fundamental perspective, our approach leads to insights into the relations between several known entanglement criteria -- such as the computable cross norm and local uncertainty criteria -- as well as their limitations.
dc.description4 pages, no figures; v3: final version to appear in PRL
dc.identifierhttps://arxiv.org/abs/quant-ph/0611282
dc.identifierhttp://arxiv.org/abs/quant-ph/0611282
dc.identifierPhys. Rev. Lett. 99, 130504 (2007)
dc.identifierdoi:10.1103/PhysRevLett.99.130504
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139202
dc.subjectQuantum Physics
dc.titleCovariance matrices and the separability problem
dc.typetext

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