Dresden 2003 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 40: Nonlinear dynamics III
DY 40.2: Vortrag
Donnerstag, 27. März 2003, 10:00–10:15, G\"OR/226
Chaos control of high frequency oscillations in semiconductor superlattices — •Jan Henning Schlesner1, Andreas Amann1, Natalia Janson1,2, Wolfram Just1,3, Nursel Kilic1, and Eckehard Schöll1 — 1Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, D–10623 Berlin, Germany — 2Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom — 3Theoretische Physik I, Technische Universität Chemnitz, D–09107 Chemnitz, Germany
We present a novel scheme to stabilize chaotic oscillations in semiconductor superlattices by time delayed feedback control. We explore the parameter regimes where complex chaotic scenarios occur due to the spatio-temporal dynamics of fronts of accumulation and depletion layers which are generated at the emitter and may collide and annihilate during their transit. Chaos control is effected by time-delay autosynchronisation using a low-pass filtered global signal.