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Title: Growth of unstable interfaces in disordered media
Author: Lacasta Palacio, Ana María
Ramírez Piscina, Laureano
Casademunt i Viader, Jaume
Hernández Machado, Aurora
Rodríguez Díaz, Miguel Ángel
Keywords: Física estadística
Sistemes dinàmics diferenciables
Superfícies (Física)
Interfícies (Ciències físiques)
Statistical physics
Differentiable dynamical systems
Surfaces (Physics)
Interfaces (Physical sciences)
Issue Date: 1998
Publisher: The American Physical Society
Abstract: The effects of a disordered medium in the growth of unstable interfaces are studied by means of two local models with multiplicative and additive quenched disorder, respectively. For short times and large pushing the multiplicative quenched disorder is equivalent to a time-dependent noise. In this regime, the linear dispersion relation contains a destabilizing contribution introduced by the noise. For long times, the interface always gets pinned. We model the systematics of the pinned shapes by means of an effective nonlinear model. These results show good agreement with numerical simulations. For the additive noise we find numerically that a depinning transition occurs.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 1998, vol. 57, núm. 5, p. 1459-1464
ISSN: 1539-3755
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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