Genuine multipartite entanglement in the XY model

Author(s)

S. M. Giampaolo, B. C. Hiesmayr

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.

Organisation(s)

Particle Physics

Journal

Physical Review A

Volume

No. of pages

ISSN

1050-2947

DOI

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

Publication date

11-2013

Peer reviewed

Yes

Austrian Fields of Science 2012

103036 Theoretical physics, 103009 Solid state physics, 103025 Quantum mechanics

Keywords

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