Dresden 2009 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 26: Poster II

DY 26.40: Poster

Thursday, March 26, 2009, 16:00–18:00, P1A

Semiclassical theory of switching between period two-states of parametrically forced oscillator — •Alvise Verso and Joachim Ankerhold — Institut für Theoretische Physik Universität Ulm, Germany

Switching between period two-states of an underdamped quantum oscillator parametrically forced is studied in a rotating frame. Within a systematic semiclassical formalism an extension of the classical diffusion equation is derived starting from a quantum master equation. The decay rate is obtained from the stationary non-equilibrium solution and captures the intimate interplay between thermal and quantum fluctuations above the crossover to the deep quantum regime.