Separability and entanglement in finite dimer-type chains in general transverse fields

We determine the conditions under which general dimer-type spin chains with XYZ couplings of arbitrary range in a general transverse field will exhibit an exactly separable parity-breaking eigenstate. We also provide sufficient conditions which ensure that it will be a ground state. We then examine...

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Autores principales:	Canosa, Norma Beatriz, Rossignoli, Raúl Dante, Matera, Juan Mauricio
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2010
Materias:	Física Quantum entanglement Physics Eigenvalues and eigenvectors Field (physics) Spins Squashed entanglement Quantum mechanics Ground state Quantum phase transition Spin-½
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125925
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125925
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Física Quantum entanglement Physics Eigenvalues and eigenvectors Field (physics) Spins Squashed entanglement Quantum mechanics Ground state Quantum phase transition Spin-½
spellingShingle	Física Quantum entanglement Physics Eigenvalues and eigenvectors Field (physics) Spins Squashed entanglement Quantum mechanics Ground state Quantum phase transition Spin-½ Canosa, Norma Beatriz Rossignoli, Raúl Dante Matera, Juan Mauricio Separability and entanglement in finite dimer-type chains in general transverse fields
topic_facet	Física Quantum entanglement Physics Eigenvalues and eigenvectors Field (physics) Spins Squashed entanglement Quantum mechanics Ground state Quantum phase transition Spin-½
description	We determine the conditions under which general dimer-type spin chains with XYZ couplings of arbitrary range in a general transverse field will exhibit an exactly separable parity-breaking eigenstate. We also provide sufficient conditions which ensure that it will be a ground state. We then examine the exact side limits at separability of the entanglement between any two spins in a finite chain, showing that in the vicinity of separability, the system will loose all signatures of dimerization, with pairwise entanglement approaching infinite range and becoming independent of separation and interaction range. The possibility of a nonuniform exactly separable ground state induced by an alternating field is also shown. As illustration, we examine the behavior of the pairwise entanglement in a finite XY dimer chain under a uniform as well as alternating field. Related aspects of the magnetization are also discussed.
format	Articulo Articulo
author	Canosa, Norma Beatriz Rossignoli, Raúl Dante Matera, Juan Mauricio
author_facet	Canosa, Norma Beatriz Rossignoli, Raúl Dante Matera, Juan Mauricio
author_sort	Canosa, Norma Beatriz
title	Separability and entanglement in finite dimer-type chains in general transverse fields
title_short	Separability and entanglement in finite dimer-type chains in general transverse fields
title_full	Separability and entanglement in finite dimer-type chains in general transverse fields
title_fullStr	Separability and entanglement in finite dimer-type chains in general transverse fields
title_full_unstemmed	Separability and entanglement in finite dimer-type chains in general transverse fields
title_sort	separability and entanglement in finite dimer-type chains in general transverse fields
publishDate	2010
url	http://sedici.unlp.edu.ar/handle/10915/125925
work_keys_str_mv	AT canosanormabeatriz separabilityandentanglementinfinitedimertypechainsingeneraltransversefields AT rossignolirauldante separabilityandentanglementinfinitedimertypechainsingeneraltransversefields AT materajuanmauricio separabilityandentanglementinfinitedimertypechainsingeneraltransversefields
bdutipo_str	Repositorios
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Separability and entanglement in finite dimer-type chains in general transverse fields

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