Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders

Autores
Cabra, Daniel Carlos; Dobry, Ariel Oscar; Rossini, Gerardo Luis
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study the long wavelength limit of a spin- 2 Heisenberg antiferromagnetic two-leg ladder, treating the interchain coupling in a nonperturbative way. We perform a mean field analysis and then include the fluctuations in an exact way. This allows for a discussion of the phase diagram of the system and provides an effective-field theory for the low-energy excitations. The coset fermionic Lagrangian obtained corresponds toa perturbed SU(4)  / U(1) conformal field theory CFT . This effective theory is naturally embedded in a SU(2) x Z_2 CFT, where perturbations are easily identified in terms of conformal operators in the two sectors.Crossed and zigzag ladders are also discussed using the same approach.
Fil: Cabra, Daniel Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Dobry, Ariel Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Fil: Rossini, Gerardo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/98120
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spelling Nonperturbative effective-field theory for two-leg antiferromagnetic spin laddersCabra, Daniel CarlosDobry, Ariel OscarRossini, Gerardo Luishttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study the long wavelength limit of a spin- 2 Heisenberg antiferromagnetic two-leg ladder, treating the interchain coupling in a nonperturbative way. We perform a mean field analysis and then include the fluctuations in an exact way. This allows for a discussion of the phase diagram of the system and provides an effective-field theory for the low-energy excitations. The coset fermionic Lagrangian obtained corresponds toa perturbed SU(4)  / U(1) conformal field theory CFT . This effective theory is naturally embedded in a SU(2) x Z_2 CFT, where perturbations are easily identified in terms of conformal operators in the two sectors.Crossed and zigzag ladders are also discussed using the same approach.Fil: Cabra, Daniel Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Dobry, Ariel Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaFil: Rossini, Gerardo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaAmerican Physical Society2001-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/98120Cabra, Daniel Carlos; Dobry, Ariel Oscar; Rossini, Gerardo Luis; Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders; American Physical Society; Physical Review B; 63; 14; 12-2001; 144408-1444170163-1829CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.63.144408info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.63.144408info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:28:11Zoai:ri.conicet.gov.ar:11336/98120instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:28:11.425CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
title Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
spellingShingle Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
Cabra, Daniel Carlos
title_short Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
title_full Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
title_fullStr Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
title_full_unstemmed Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
title_sort Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders
dc.creator.none.fl_str_mv Cabra, Daniel Carlos
Dobry, Ariel Oscar
Rossini, Gerardo Luis
author Cabra, Daniel Carlos
author_facet Cabra, Daniel Carlos
Dobry, Ariel Oscar
Rossini, Gerardo Luis
author_role author
author2 Dobry, Ariel Oscar
Rossini, Gerardo Luis
author2_role author
author
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We study the long wavelength limit of a spin- 2 Heisenberg antiferromagnetic two-leg ladder, treating the interchain coupling in a nonperturbative way. We perform a mean field analysis and then include the fluctuations in an exact way. This allows for a discussion of the phase diagram of the system and provides an effective-field theory for the low-energy excitations. The coset fermionic Lagrangian obtained corresponds toa perturbed SU(4)  / U(1) conformal field theory CFT . This effective theory is naturally embedded in a SU(2) x Z_2 CFT, where perturbations are easily identified in terms of conformal operators in the two sectors.Crossed and zigzag ladders are also discussed using the same approach.
Fil: Cabra, Daniel Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Dobry, Ariel Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Fil: Rossini, Gerardo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
description We study the long wavelength limit of a spin- 2 Heisenberg antiferromagnetic two-leg ladder, treating the interchain coupling in a nonperturbative way. We perform a mean field analysis and then include the fluctuations in an exact way. This allows for a discussion of the phase diagram of the system and provides an effective-field theory for the low-energy excitations. The coset fermionic Lagrangian obtained corresponds toa perturbed SU(4)  / U(1) conformal field theory CFT . This effective theory is naturally embedded in a SU(2) x Z_2 CFT, where perturbations are easily identified in terms of conformal operators in the two sectors.Crossed and zigzag ladders are also discussed using the same approach.
publishDate 2001
dc.date.none.fl_str_mv 2001-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/98120
Cabra, Daniel Carlos; Dobry, Ariel Oscar; Rossini, Gerardo Luis; Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders; American Physical Society; Physical Review B; 63; 14; 12-2001; 144408-144417
0163-1829
CONICET Digital
CONICET
url http://hdl.handle.net/11336/98120
identifier_str_mv Cabra, Daniel Carlos; Dobry, Ariel Oscar; Rossini, Gerardo Luis; Nonperturbative effective-field theory for two-leg antiferromagnetic spin ladders; American Physical Society; Physical Review B; 63; 14; 12-2001; 144408-144417
0163-1829
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.63.144408
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.63.144408
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.221938

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