Regensburg 2013 – scientific programme

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O: Fachverband Oberflächenphysik

O 85: Transport: Topological Insulators (jointly with DS, HL, MA, and TT)

O 85.8: Talk

Friday, March 15, 2013, 11:30–11:45, H18

Floquet Topological Quantum Phase Transitions in the Wen-Plaquette Model — •Victor Manuel Bastidas Valencia, Clive Emary, Gernot Schaller, and Tobias Brandes — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

Our aim in this talk is to describe the nonequilibrium behavior of the topological quantum phase transition in the Ac-driven Wen-plaquette model. We show that under the effect of a nonadiabatic driving the system exhibits a novel topological phase. We define generalized topological order parameters by considering cycle-averaged expectation values of string operators in a Floquet state.