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DY: Fachverband Dynamik und Statistische Physik

DY 4: Quantum Dynamics, Decoherence, and Quantum Information

DY 4.7: Vortrag

Montag, 26. März 2012, 16:45–17:00, MA 001

Non-equilibrium Quantum Phase Transitions in the Dicke Model — •Victor Manuel Bastidas Valencia, Clive Emary, Benjamin Regler, and Tobias Brandes — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We establish a set of non-equilibrium quantum phase transitions in the Dicke model by considering a monochromatic non-adiabatic modulation of the atom-field coupling. For weak driving the system exhibits a set of side-bands which allow the circumvention of the no-go theorem which otherwise forbids the occurence of superradiant phase transitions. At strong driving we show that the system exhibits a rich multistable structure and exhibits both first- and second-order non-equilibrium quantum phase transitions.