Excited-state phase transition and onset of chaos in quantum optical models

We study critical behavior of excited states and its relation to order and chaos in the Jaynes- Cummings and Dicke models of quantum optics. We show that both models exhibit a chain of excited-state quantum phase transitions demarcating the upper edge of the superradiant phase. For the Dicke model,...

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Detalles Bibliográficos
Autores: Pérez Fernández, Pedro, Relaño Pérez, Armando, Arias Carrasco, José Miguel, Cejnar, P., Dukelsky, J., García Ramos, José Enrique
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/5502
Acceso en línea:http://hdl.handle.net/10272/5502
Access Level:acceso abierto
Palabra clave:Quantum phase transitions
Descripción
Sumario:We study critical behavior of excited states and its relation to order and chaos in the Jaynes- Cummings and Dicke models of quantum optics. We show that both models exhibit a chain of excited-state quantum phase transitions demarcating the upper edge of the superradiant phase. For the Dicke model, the signatures of criticality in excited states are blurred by the onset of chaos which happens in the same energy region.

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