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Título:
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Quantum quench influenced by an excited-state phase transition
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Autores:
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Pérez Fernández, P. ;
Cejnar, P. ;
Arias, J. M. ;
Dukelsky, J. ;
García Ramos, J. E. ;
Relaño Pérez, Armando
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2011-03-03
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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: Termodinámica
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Tipo = Artículo
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Resumen:
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We analyze excited-state quantum phase transitions (ESQPTs) in three schematic (integrable and nonintegrable) models describing a single-mode bosonic field coupled to a collection of atoms. It is shown that the presence of the ESQPT in these models affects the quantum relaxation processes following an abrupt quench in the control parameter. Clear-cut evidence of the ESQPT effects is presented in integrable models, while in a nonintegrable model the evidence is blurred due to chaotic behavior of the system in the region around the critical energy.
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En línea:
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https://eprints.ucm.es/id/eprint/27466/1/Relano14libre.pdf
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