Genuine multipartite entanglement in the XY model

S. M. Giampaolo (Korresp. Autor*in), B. C. Hiesmayr

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

Abstract

We analyze the XY model characterized by an anisotropy γ in an external magnetic field, h, with respect to its genuine multipartite entanglement content (in the thermodynamic and finite-size case). Despite its simplicity we show that the quantity—detecting genuine multipartite entanglement through permutation operators and being a lower bound on measures—witnesses the presence of genuine multipartite entanglement for nearly all values of γ and h. We further show that the phase transition and scaling properties are fully characterized by this multipartite quantity. Consequently, we provide a useful toolbox for other condensed-matter systems, where bipartite entanglement measures are known to fail.
OriginalspracheEnglisch
Aufsatznummer052305
Seitenumfang9
FachzeitschriftPhysical Review A
Jahrgang88
Ausgabenummer5
DOIs
PublikationsstatusVeröffentlicht - 7 Nov. 2013

ÖFOS 2012

  • 103036 Theoretische Physik
  • 103009 Festkörperphysik
  • 103025 Quantenmechanik

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