Short time relaxation of a driven elastic string in a random medium

Details Short time relaxation of a driven elastic string in a random medium Short time relaxation of a driven elastic string in a random medium

2006-08-17

arxiv.org/abs/cond-mat/0608386v1

Phys. Rev. B 74, 140201(R) (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4.2 pages, 3 figures

Scientific paper

10.1103/PhysRevB.74.140201

We study numerically the relaxation of a driven elastic string in a two dimensional pinning landscape. The relaxation of the string, initially flat, is governed by a growing length $L(t)$ separating the short steady-state equilibrated lengthscales, from the large lengthscales that keep memory of the initial condition. We find a macroscopic short time regime where relaxation is universal, both above and below the depinning threshold, different from the one expected for standard critical phenomena. Below the threshold, the zero temperature relaxation towards the first pinned configuration provides a novel, experimentally convenient way to access all the critical exponents of the depinning transition independently.

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