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Título:
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String order and symmetries in quantum spin lattices
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Autores:
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Pérez García, David ;
Wolf, M.M. ;
Sanz, M. ;
Verstraete, F. ;
Cirac, J.I.
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Tipo de documento:
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texto impreso
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Editorial:
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The American Physical Society, 2008-04-25
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Teoría de los quanta
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Tipo = Artículo
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Resumen:
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We show that the existence of string order in a given quantum state is intimately related to the presence of a local symmetry by proving that both concepts are equivalent within the framework of finitely correlated states. Once this connection is established, we provide a complete characterization of local symmetries in these states. The results allow us to understand in a straightforward way many of the properties of string order parameters, like their robustness or fragility under perturbations and their typical disappearance beyond strictly one-dimensional lattices. We propose and discuss an alternative definition, ideally suited for detecting phase transitions, and generalizations to two and more spatial dimensions.
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En línea:
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https://eprints.ucm.es/id/eprint/17827/1/PerezGarcia27.pdf
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