Tag diffusion in driven systems, growing interfaces and anomalous fluctuations

Majumdar, S. N. ; Barma, Mustansir (1991) Tag diffusion in driven systems, growing interfaces and anomalous fluctuations Physical Review B: Condensed Matter and Materials Physics, 44 (10). pp. 5306-5308. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v44/i10/p5306_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.44.5306

Abstract

Tagged diffusion in a one-dimensional hard-core lattice gas with biased nearest-neighbor hopping is mapped to a model of a growing interface. Based on the Kardar-Parisi-Zhang theory of interface dynamics, it is suggested that fluctuations, in the separation of the initial position of a tagged particle from the position at time t of a particle with tag shifted by vt at time t, grow at t½ for most v, and as t1/3 for a critical vc. This is verified by numerical simulation, and the dependence of vc on bias and density is found. The t¼ growth of fluctuations in the unbiased case is unstable with respect to both bias and v-vc.

Item Type:Article
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ID Code:79600
Deposited On:27 Jan 2012 12:59
Last Modified:27 Jan 2012 12:59

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