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Título: | Quantum quench influenced by an excited-state phase transition |
Autor: | Pérez-Fernández, P.; Cejnar, P.; Arias, José María; Dukelsky, Jorge CSIC ORCID; García Ramos, José Enrique; Relaño, Armando CSIC ORCID CVN | Fecha de publicación: | 2011 | Editor: | American Physical Society | Citación: | Physical Review A, 83: 033802 (2011) | Resumen: | 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. © 2011 American Physical Society. | URI: | http://hdl.handle.net/10261/59290 | DOI: | 10.1103/PhysRevA.83.033802 | Identificadores: | doi: 10.1103/PhysRevA.83.033802 issn: 1050-2947 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos |
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Pérez-Fernández.pdf | 816,28 kB | Adobe PDF | Visualizar/Abrir |
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