Noise-induced front motion: Signature of a global bifurcation

Hizanidis, Johanne; Balanov, A; Amann, Andreas; Scholl, E

Noise-induced front motion: Signature of a global bifurcation

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Published Version

Date

2006

Authors

Hizanidis, Johanne

Balanov, A

Amann, Andreas

Scholl, E

Publisher

American Physical Society

Published Version

10.1103/PhysRevLett.96.244104

Abstract

We show that front motion can be induced by noise in a spatially extended excitable system with a global constraint. Our model system is a semiconductor superlattice exhibiting complex dynamics of electron accumulation and depletion fronts. The presence of noise induces a global change in the dynamics of the system forcing stationary fronts to move through the entire device. We demonstrate the effect of coherence resonance in our model; i.e., there is an optimal level of noise at which the regularity of front motion is enhanced. Physical insight is provided by relating the space-time dynamics of the fronts with a phase-space analysis.

Keywords

Semiconductor superlattices , Stochastic resonance , Oscillations , Transport , Domains , System , gaAs

Citation

Hizanidis, J., Balanov, A., Amann, A. and Schöll, E. (2006) 'Noise-induced front motion: Signature of a global bifurcation', Physical Review Letters, 96(24), 244104 (4pp). doi: 10.1103/PhysRevLett.96.244104