Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 7: Statistical physics far from thermal equilibrium

DY 7.2: Vortrag

Montag, 26. März 2007, 14:45–15:00, H5

Switching in time-periodic quantum systems with dissipation — •Waltraut Wustmann and Roland Ketzmerick — Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany

A novel switching mechanism for open time-periodic quantum systems is demonstrated. We derive the consequences of isolated avoided crossings on the time-periodic stationary dynamics for weak system-bath coupling using a Floquet-Markov approach. For an asymmetric double well potential under variation of the driving amplitude the dominant probability switches from a state in the lower well to a state in the other well with a higher average energy. We propose an experimental demonstration with atoms in optical potentials and time-periodic magnetic fields.