Local description of quantum inseparability

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dc.contributor	Universitat de Barcelona
dc.contributor.author	Sanpera Trigueros, Anna
dc.contributor.author	Tarrach, R., 1948-
dc.contributor.author	Vidal Bonafont, Guifré
dc.date	2009-10-06T09:25:12Z
dc.date	2009-10-06T09:25:12Z
dc.date	1998
dc.identifier.citation	1050-2947
dc.identifier.citation	146066
dc.identifier.uri	http://hdl.handle.net/2445/9552
dc.format	5 p.
dc.format	application/pdf
dc.language.iso	eng
dc.publisher	The American Physical Society
dc.relation	Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.58.826
dc.relation	Physical Review A, 1998, vol. 58, núm. 2, p. 826-830.
dc.relation	http://dx.doi.org/10.1103/PhysRevA.58.826
dc.rights	(c) The American Physical Society, 1998
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Mecànica quàntica
dc.subject	Quantum mechanics
dc.title	Local description of quantum inseparability
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.description.abstract	We show how to decompose any density matrix of the simplest binary composite systems, whether separable or not, in terms of only product vectors. We determine for all cases the minimal number of product vectors needed for such a decomposition. Separable states correspond to mixing from one to four pure product states. Inseparable states can be described as pseudomixtures of four or five pure product states, and can be made separable by mixing them with one or two pure product states.