Pérez Fernández, PedroRelaño Pérez, ArmandoArias Carrasco, José MiguelCejnar, P.Dukelsky, J.García Ramos, José Enrique2012-03-022012-03-022011-04-15Pérez Fernández, P., Relaño Pérez, A., Arias Carrasco, J.M., Cejnar, P., Dukelsky, J., García Ramos, J.E.: "Excited-state phase transition and onset of chaos in quantum optical models". Physical Review E. Vol. 83, n. 4 (2011). ISSN 1539-37551539-3755http://hdl.handle.net/10272/5502We 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.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/BosonesQuantum phase transitionsjournal article10.1103/PhysRevE.83.046208open access