Berlin 2005 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 31: Nonlinear Stochastic Systems I

DY 31.4: Vortrag

Montag, 7. März 2005, 11:15–11:30, TU H2032

Control of noise-induced oscillations in superlattices — •Johanne Hizanidis, Alexander Balanov, Andreas Amann, and Eckehard Schöll — Institut für Theoretische Physik, TU Berlin, Hardenbergstr. 36, 10623 Berlin

Superlattices are spatially extended systems with complex dynamics of interacting fronts [1]. We consider noise-induced dynamics of a superlattice below the Hopf bifurcation, where in the absence of noise the system exhibits a fixed point. We show that delayed feedback control that was previously used for manipulation of noise-induced oscillations in systems without spatial degrees of freedom [2], can not only enhance or deteriorate the regularity of stochastic spatio-temporal motion but also allows the manipulation of the system’s timescales with varying time delay.

[1] A. Wacker, Phys. Rep. 357, 1-111 (2002)

[2] N. B. Janson, A. G. Balanov, and E. Schöll, Phys. Rev. Lett. 93, 010601 (2004)