Noise-induced front motion: Signature of a global bifurcation
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Date
2006
Authors
Hizanidis, Johanne
Balanov, A
Amann, Andreas
Scholl, E
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Publisher
American Physical Society
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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.
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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
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© 2006, American Physical Society