Carpio Rodríguez, Ana María 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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Official URL: http://arxiv.org/pdf/cond-mat/0201318.pdf
Abstract
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 11:44 |
| Last Modified: | 03 May 2012 11:44 |
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