(Global and Local) Fluctuations of Phase Space Contraction in Deterministic Stationary Non-equilibrium

Details (Global and Local) Fluctuations of Phase Space Contraction in Deterministic Stationary Non-equilibrium (Global and Local) Fluctuations of Phase Space Contraction in Deterministic Stationary Non-equilibrium

1998-04-09

arxiv.org/abs/chao-dyn/9804020v2

Nonlinear Sciences

Chaotic Dynamics

18 pages, 11 figures

Scientific paper

10.1063/1.166369

We studied numerically the validity of the fluctuation theorem, introduced by Evans,Cohen and Morris and proved by Gallavotti and Cohen, for a 2-dimensional system of particles maintained in a steady shear flow by Maxwell daemon boundary conditions (see Chernov and Lebowitz). The theorem was found to hold if one considers the total phase space contraction $\sigma$ occuring at collisions with both walls: $\sigma=\sigma^\su+\sigma^\giu$. An attempt to extend it to more local quantities $\sigma^\su$ and $\sigma^\giu$, corresponding to the collisions with the top or bottom wall only, gave negative results. The time decay of the correlations in $\sigma^{\su,\giu}$ was very slow compared to that of $\sigma$.

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