External fluctuations in front propagation
We study the effects of external noise in a one-dimensional model of front propagation. Noise is introduced through the fluctuations of a control parameter leading to a multiplicative stochastic partial differential equation. Analytical and numerical results for the front shape and velocity are pres...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1996 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/16035 |
| Acceso en línea: | https://hdl.handle.net/2117/16035 |
| Access Level: | acceso abierto |
| Palabra clave: | Quantum theory Fluid dynamics Reaction-diffusion equations Fronts Fluctuations Multiplicative noise Langevin equation Digital simulation Teoria quàntica Dinàmica de fluids Àrees temàtiques de la UPC::Física |
| Sumario: | We study the effects of external noise in a one-dimensional model of front propagation. Noise is introduced through the fluctuations of a control parameter leading to a multiplicative stochastic partial differential equation. Analytical and numerical results for the front shape and velocity are presented. The linear-marginal-stability theory is found to increase its range of validity in the presence of external noise. As a consequence noise can stabilize fronts not allowed by the deterministic equation |
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