Enhancement of pairwise entanglement from ℤ𝟸 symmetry breaking

A. Osterloh; G. Palacios; S. Montangero

doi:10.1103/PhysRevLett.97.257201

Enhancement of pairwise entanglement from ℤ_𝟸 symmetry breaking

A. Osterloh
, G. Palacios
, S. Montangero

Institute of Theoretical Physics

Research output: Contribution to journal › Article › Research › peer review

Abstract

We 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.

Original language	English
Article number	257201
Journal	Physical Review Letters
Volume	97
DOIs	https://doi.org/10.1103/PhysRevLett.97.257201 https://doi.org/10.48550/arXiv.cond-mat/0608244
Publication status	Published - 18 Dec 2006

Keywords

cond-mat.str-el
quant-ph

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Cite this

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