Pair entanglement in dimerized spin-<i>s</i> chains

We examine the pair entanglement in the ground state of finite dimerized spin-s chains interacting through anisotropic XY couplings immersed in a transverse magnetic field by means of a self-consistent pair mean-field approximation. The approach, which makes no a priori assumptions on the pair state...

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Autores principales: Boette, Alan Pablo, Rossignoli, Raúl Dante, Canosa, Norma Beatriz, Matera, Juan Mauricio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/96303
https://ri.conicet.gov.ar/11336/65916
https://journals.aps.org/prb/pdf/10.1103/PhysRevB.94.214403
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-96303
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
spellingShingle Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
Boette, Alan Pablo
Rossignoli, Raúl Dante
Canosa, Norma Beatriz
Matera, Juan Mauricio
Pair entanglement in dimerized spin-<i>s</i> chains
topic_facet Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
description We examine the pair entanglement in the ground state of finite dimerized spin-s chains interacting through anisotropic XY couplings immersed in a transverse magnetic field by means of a self-consistent pair mean-field approximation. The approach, which makes no a priori assumptions on the pair states, predicts, for sufficiently low coupling between pairs, 2s distinct dimerized phases for increasing fields below the pair factorizing field, separated by spin-parity-breaking phases. The dimerized phases lead to approximate magnetization and pair entanglement plateaus, while the parity-breaking phases are characterized by weak pair entanglement but non-negligible entanglement of the pair with the rest of the system. These predictions are confirmed by the exact results obtained in finite s=1 and s=3/2 chains. It is also shown that for increasing values of the spin s, the entanglement of an isolated pair, as measured by the negativity, rapidly saturates in the anisotropic XY case but increases as s1/2 in the XX case, reflecting a distinct single-spin entanglement spectrum.
format Articulo
Articulo
author Boette, Alan Pablo
Rossignoli, Raúl Dante
Canosa, Norma Beatriz
Matera, Juan Mauricio
author_facet Boette, Alan Pablo
Rossignoli, Raúl Dante
Canosa, Norma Beatriz
Matera, Juan Mauricio
author_sort Boette, Alan Pablo
title Pair entanglement in dimerized spin-<i>s</i> chains
title_short Pair entanglement in dimerized spin-<i>s</i> chains
title_full Pair entanglement in dimerized spin-<i>s</i> chains
title_fullStr Pair entanglement in dimerized spin-<i>s</i> chains
title_full_unstemmed Pair entanglement in dimerized spin-<i>s</i> chains
title_sort pair entanglement in dimerized spin-<i>s</i> chains
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/96303
https://ri.conicet.gov.ar/11336/65916
https://journals.aps.org/prb/pdf/10.1103/PhysRevB.94.214403
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AT canosanormabeatriz pairentanglementindimerizedspinisichains
AT materajuanmauricio pairentanglementindimerizedspinisichains
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