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Type: Artigo de periódico
Title: Classical dissipation and asymptotic equilibrium via interaction with chaotic systems
Author: Bonanca, MVS
de Aguiar, MAM
Abstract: We study the energy flow between a one-dimensional oscillator and a chaotic system with two degrees of freedom in the weak coupling limit. The oscillator's observables are averaged over an initially microcanonical ensemble of trajectories of the chaotic system, which plays the role of an environment for the oscillator. We show numerically that the oscillator's average energy exhibits irreversible dynamics and 'thermal' equilibrium at long times. We use linear response theory to describe the dynamics at short times and we derive a condition for the absorption or dissipation of energy by the oscillator from the chaotic system. The equilibrium properties at long times, including the average equilibrium energies and the energy distributions, are explained with the help of statistical arguments. We also check that the concept of temperature defined in terms of the 'volume entropy' agrees very well with these energy distributions. (c) 2005 Elsevier B.V. All rights reserved.
Subject: low-dimensional chaos
energy flow
Brownian motion
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.physa.2005.09.062
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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