Genuine multipartite entanglement in the XY model

Autor(en)

S. M. Giampaolo, B. C. Hiesmayr

Abstrakt

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.

Organisation(en)

Teilchenphysik

Journal

Physical Review A

Band

Anzahl der Seiten

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.88.052305

Publikationsdatum

11-2013

Peer-reviewed

ÖFOS 2012

103036 Theoretische Physik, 103009 Festkörperphysik, 103025 Quantenmechanik

Schlagwörter

Link zum Portal