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Effects of disorder on the wave front depinning transition in spatially discrete systems


Carpio, Ana y Bonilla, L.L. y Luzón, Ana (2002) Effects of disorder on the wave front depinning transition in spatially discrete systems. Physical Review E, 65 (3). ISSN 1539-3755

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Pinning and depinning of wave fronts are ubiquitous features of spatially discrete systems describing a host of phenomena in physics, biology, etc. A large class of discrete systems is described by overdamped chains of nonlinear oscillators with nearest- neighbor coupling and subject to random external forces. The presence of weak randomness shrinks the pinning interval and it changes the critical exponent of the wave front depinning transition from 1/2 to 3/2. This effect is derived by means of a recent asymptotic theory of the depinning transition, extended to discrete drift-diffusion models of transport in semiconductor superlattices and is confirmed by numerical calculations.

Tipo de documento:Artículo
Palabras clave:Charge-density waves; Propagation; Dynamics; Model
Materias:Ciencias > Física > Física matemática
Código ID:15051

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