Negativity and Concurrence of mixed 2X2 states

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dc.creatorAudenaert, Koenraad
dc.creatorVerstraete, Frank
dc.creatorDe Bie, Tijl
dc.creatorDe Moor, Bart
dc.date2000-12-15
dc.date.accessioned2026-07-07T06:01:22Z
dc.date.available2026-07-07T06:01:22Z
dc.descriptionWe consider two measures of entanglement of mixed bipartite states of dimension 2X2: concurrence and negativity. We first prove the conjecture of Eisert and Plenio that concurrence can never be smaller than negativity. We then characterise all states for which concurrence equals negativity and also those states for which the difference between concurrence and negativity is maximal (keeping either the concurrence fixed, or the participation ratio R=1/trace(rho^2)).
dc.description4 pages, 2 figures included. QIP2001 workshop, January 2001, Amsterdam; for an extended version see quant-ph/0108021
dc.identifierhttps://arxiv.org/abs/quant-ph/0012074
dc.identifierhttp://arxiv.org/abs/quant-ph/0012074
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/89233
dc.subjectQuantum Physics
dc.titleNegativity and Concurrence of mixed 2X2 states
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