Global entanglement in XXZ chains
We examine the thermal entanglement of XXZ-type Heisenberg chains in the presence of a uniform magnetic field along the z axes through the evaluation of the negativity associated with bipartitions of the whole system and subsystems. Limit temperatures for nonzero global negativities are shown to dep...
Autores principales: | , |
---|---|
Formato: | Articulo |
Lenguaje: | Inglés |
Publicado: |
2006
|
Materias: | |
Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/126331 |
Aporte de: |
id |
I19-R120-10915-126331 |
---|---|
record_format |
dspace |
institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
collection |
SEDICI (UNLP) |
language |
Inglés |
topic |
Ciencias Exactas Física thermal entanglement Heisenberg chains uniform magnetic field limit temperatures global bipartite entanglement bipartition |
spellingShingle |
Ciencias Exactas Física thermal entanglement Heisenberg chains uniform magnetic field limit temperatures global bipartite entanglement bipartition Canosa, Norma Beatriz Rossignoli, Raúl Dante Global entanglement in XXZ chains |
topic_facet |
Ciencias Exactas Física thermal entanglement Heisenberg chains uniform magnetic field limit temperatures global bipartite entanglement bipartition |
description |
We examine the thermal entanglement of XXZ-type Heisenberg chains in the presence of a uniform magnetic field along the z axes through the evaluation of the negativity associated with bipartitions of the whole system and subsystems. Limit temperatures for nonzero global negativities are shown to depend on the asymmetry Δ, but not on the uniform field, and can be much higher than those limiting pairwise entanglement. It is also shown that global bipartite entanglement may exist for T > 0 even for Δ ≥ 1, i.e., when the system is fully aligned (and hence separable) at T = 0, and that the bipartition leading to the highest limit temperature depends on Δ. |
format |
Articulo Articulo |
author |
Canosa, Norma Beatriz Rossignoli, Raúl Dante |
author_facet |
Canosa, Norma Beatriz Rossignoli, Raúl Dante |
author_sort |
Canosa, Norma Beatriz |
title |
Global entanglement in XXZ chains |
title_short |
Global entanglement in XXZ chains |
title_full |
Global entanglement in XXZ chains |
title_fullStr |
Global entanglement in XXZ chains |
title_full_unstemmed |
Global entanglement in XXZ chains |
title_sort |
global entanglement in xxz chains |
publishDate |
2006 |
url |
http://sedici.unlp.edu.ar/handle/10915/126331 |
work_keys_str_mv |
AT canosanormabeatriz globalentanglementinxxzchains AT rossignolirauldante globalentanglementinxxzchains |
bdutipo_str |
Repositorios |
_version_ |
1764820450415738880 |