Anomalous kinetics and transport from 1D self--consistent mode--coupling theory

Details Anomalous kinetics and transport from 1D self--consistent mode--coupling theory Anomalous kinetics and transport from 1D self--consistent mode--coupling theory

2006-11-10

arxiv.org/abs/cond-mat/0611278v1

J. Stat. Mech. (2007) P02007

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We study the dynamics of long-wavelength fluctuations in one-dimensional (1D) many-particle systems as described by self-consistent mode-coupling theory. The corresponding nonlinear integro-differential equations for the relevant correlators are solved analytically and checked numerically. In particular, we find that the memory functions exhibit a power-law decay accompanied by relatively fast oscillations. Furthermore, the scaling behaviour and, correspondingly, the universality class depends on the order of the leading nonlinear term. In the cubic case, both viscosity and thermal conductivity diverge in the thermodynamic limit. In the quartic case, a faster decay of the memory functions leads to a finite viscosity, while thermal conductivity exhibits an even faster divergence. Finally, our analysis puts on a more firm basis the previously conjectured connection between anomalous heat conductivity and anomalous diffusion.

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