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


Carpio, Ana and Bonilla, L.L. and 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.

Item Type:Article
Uncontrolled Keywords:Charge-density waves; Propagation; Dynamics; Model
Subjects:Sciences > Physics > Mathematical physics
ID Code:15051

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Deposited On:03 May 2012 09:44
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