Decrease of entanglement by local operations in the Dür-Cirac method

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dc.creatorOta, Yukihiro
dc.creatorYoshida, Motoyuki
dc.creatorOhba, Ichiro
dc.date2007-04-11
dc.date.accessioned2026-07-07T07:56:07Z
dc.date.available2026-07-07T07:56:07Z
dc.descriptionOne cannot always obtain information about entanglement by the Dür-Cirac (DC) method. The impracticality is attributed to the decrease of entanglement by local operations in the DC method. We show that, even in 2--qubit systems, there exist states whose entangled property the DC method never evaluates. The class of such states in 2--qubit systems is completely characterized by the value of the fully entangled fraction. Actually, a state whose fully entangled fraction is less than or equal to 1/2 is always transformed into a separable state by local operations in the DC method, even if it has negative partial transposition.
dc.description5 pages
dc.identifierhttps://arxiv.org/abs/0704.1375
dc.identifierhttp://arxiv.org/abs/0704.1375
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/127196
dc.subjectQuantum Physics
dc.titleDecrease of entanglement by local operations in the Dür-Cirac method
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