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...

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Detalles Bibliográficos
Autores principales: Canosa, Norma Beatriz, Rossignoli, Raúl Dante
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
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