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Nonequilibrium quantum phase transitions in the Dicke model
Authors:Bastidas V M  Emary C  Regler B  Brandes T
Affiliation:Institut für Theoretische Physik, Technische Universit?t Berlin, Hardenbergstra?e 36, D-10623 Berlin, Germany.
Abstract:We establish a set of nonequilibrium quantum phase transitions in the Dicke model by considering a monochromatic nonadiabatic modulation of the atom-field coupling. For weak driving the system exhibits a set of sidebands which allow the circumvention of the no-go theorem which otherwise forbids the occurrence of superradiant phase transitions. At strong driving we show that the system exhibits a rich multistable structure and exhibits both first- and second-order nonequilibrium quantum phase transitions.
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