A non-extensive approach to the time evolution of Lyapunov coefficients

Details A non-extensive approach to the time evolution of Lyapunov coefficients A non-extensive approach to the time evolution of Lyapunov coefficients

2000-04-10

arxiv.org/abs/cond-mat/0004155v1

Physics

Condensed Matter

Statistical Mechanics

10 pages, 6 figures

Scientific paper

We study sporadic randomness by means of a non-extensive form of Lyapunov coefficient. We recover from a different perspective the same conclusion as that of an earlier work, namely, that the ordinary Pesin theorem applies (P.Gaspard and X.-J. Wang, Proc. Natl. Acad. Sci. USA {\bf85}, 4591 (1988)). However, our theoretical analysis allows us to organize the numerical calculations so as to reveal the slow transition from a temporary form of non-extensive thermodynamics, corresponding to the prediction of a recent paper (M. Buiatti, P. Grigolini, A. Montagnini, Phys. Rev. Lett {\bf 82}, 3383 (1999)), to the ordinary extensive thermodynamics. We show that the transition takes place with a slow decay corresponding to the regression from a non-equilibrium initial condition to equilibrium condition.

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