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Microscopic chaos from Brownian motion in a one-dimensional anharmonic oscillator chain.

作者信息

Romero-Bastida M, Braun E

机构信息

Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Apartado Postal 55-534, Distrito Federal 09340, Mexico.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Mar;65(3 Pt 2A):036228. doi: 10.1103/PhysRevE.65.036228. Epub 2002 Mar 5.

DOI:10.1103/PhysRevE.65.036228
PMID:11909233
Abstract

The problem of relating microscopic chaos to macroscopic behavior in a many-degrees-of-freedom system is numerically investigated by analyzing statistical properties associated to the position and momentum of a heavy impurity embedded in a chain of nearest-neighbor anharmonic Fermi-Pasta-Ulam oscillators. For this model we have found that the behavior of the relaxation time of the momentum autocorrelation function of the impurity is different depending on the dynamical regime (either regular or chaotic) of the lattice.

摘要

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