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One-dimensional motion in a biased random medium: Random potential versus random force

Authors
Journal
Physica A Statistical Mechanics and its Applications
0378-4371
Publisher
Elsevier
Publication Date
Volume
174
Identifiers
DOI: 10.1016/0378-4371(91)90334-9

Abstract

Abstract The one-dimensional motion of a particle in a biased random medium is studied in both cases of a random potential and of a random force. The correlations are not the same in both cases, and this is at the source of entirely different drift and diffusion behaviours. As a result, drift and diffusion are always normal in the presence of a random potential while anomalous motion and dynamical phase transitions may appear in the presence of a random force.

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