Enhancement of pairwise entanglement from $\mathbbm{Z}_2$ symmetry breaking

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dc.creatorOsterloh, A.
dc.creatorPalacios, G.
dc.creatorMontangero, S.
dc.date2006-08-10
dc.date2007-01-31
dc.date.accessioned2026-07-07T07:43:47Z
dc.date.available2026-07-07T07:43:47Z
dc.descriptionWe study the effect of symmetry breaking in a quantum phase transition on pairwise entanglement in spin-1/2 models. We give a set of conditions on correlation functions a model has to meet in order to keep the pairwise entanglement unchanged by a parity symmetry breaking. It turns out that all mean-field solvable models do meet this requirement, whereas the presence of strong correlations leads to a violation of this condition. This results in an order-induced enhancement of entanglement, and we report on two examples where this takes place.
dc.description4 pages, 3 figures, revtex4. Slight modifications, few additional remarks
dc.identifierhttps://arxiv.org/abs/cond-mat/0608244
dc.identifierhttp://arxiv.org/abs/cond-mat/0608244
dc.identifierPhys. Rev. Lett. 97, 257201 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.257201
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122965
dc.subjectStrongly Correlated Electrons
dc.subjectQuantum Physics
dc.titleEnhancement of pairwise entanglement from $\mathbbm{Z}_2$ symmetry breaking
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