Journal ArticleDOI
Effect of Fluctuation on Plane Front Propagation in Bistable Nonequilibrium Systems
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A theory of front propagation in bistable stochastic media is developed in this article, where the effect of fluctuations is twofold: 1) they lead to random variations of the front shape.Abstract:
A theory of front propagation in bistable stochastic media is developed. The effect of fluctuations is twofold: 1) they lead to random variations of the front shape. 2) they result in random motion of the front positions. Its general expression for the dispersion of the position for arbitrary stochastic noises wit,h spatial correlation length I, and correlation time t, is given. For rate functions with cubic non1,inearities the dispersion formula is further analysed. Fluktuationseffekte bei der Ausbreitung einer ebenen Front in bistsbilen Nichtgleichgewichtssystemen Inhaltsubersicht . Eine Theorie der Frontausbreitung in bistabilen stochastischen Medien wird entwickelt. Der EinfluB der Fluktuationen fiihrt zu einer zufiilligen Veriinderung der Form der Front, wie auch zu einer Zufallsbewegung der Frontposition. Ein allgemeiner Ausdruck fur die Dis- persion der Frontposition fur beliebige stochastische Quellen mit einer riiumlichen Korrelationsliinge I, und einer Korrelationszeit tc wird gegeben. Fur Ratenfunktionen mit kubischer Nichtlinearitat wird die Dispersionsformel weiter analysiert.read more
Citations
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Effects of fluctuations on propagating fronts
TL;DR: In this article, the effect of fluctuations on propagating fronts has been studied in a coherent and cogent manner in proper perspective, with the aim of making our knowledge available to a broader audience, and it is also expected to help to collect bits and pieces of loose thread-ends together for possible further investigation.
Journal ArticleDOI
Front Propagation in Stochastic Neural Fields
TL;DR: An analysis of the effects of extrinsic multiplicative noise on front propagation in a scalar neural field with excitatory connections shows that freely propagating fronts and fronts locked to an externally moving stimulus are much more robust to noise.
Journal ArticleDOI
Noise controlled spiral growth in excitable media.
Peter Jung,Gottfried Mayer-Kress +1 more
TL;DR: A two-dimensional pulse-coupled array of noisy threshold elements with a long-range interaction is considered, and the formation of spatio-temporal excitation waves, such as target and spiral waves, is observed.
Journal ArticleDOI
Neural field model of binocular rivalry waves
TL;DR: An analytical expression for the speed of a binocular rivalry wave is derived as a function of various neurophysiological parameters, and properties of the wave are consistent with the wave-like propagation of perceptual dominance observed in recent psychophysical experiments.
Journal ArticleDOI
Controlling the position of traveling waves in reaction-diffusion systems.
Jakob Löber,Harald Engel +1 more
TL;DR: An analytical expression is derived for the space (x) and time (t) dependent control function f(x,t) that is valid for arbitrary protocols and many reaction-diffusion systems and close to numerically computed optimal controls.
References
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Chemical reaction models for non-equilibrium phase transitions
TL;DR: In this article, the steady states of non-equilibrium phase transitions are discussed, and a phase transition of second order, another one of first order, and diffusion occurs in first order transition.
Journal ArticleDOI
Calculation of the dynamics of surface melting during laser annealing
Clifford M Surko,A. L. Simons,D. H. Auston,Jene Andrew Golovchenko,Richart E. Slusher,Thirumalai Venkatesan +5 more
TL;DR: In this paper, a thermal transport model is presented to describe the melting and resolidification of semiconductors which is observed to occur during annealing with a pulsed laser.
Journal ArticleDOI
Nucleation in systems with multiple stationary states
TL;DR: In this article, the macroscopic dynamics of the front structure and velocity for two model systems analytically and numerically, and for general reaction-diffusion systems by a suitable perturbation method were investigated.