On the correct entropic form for systems with power-law behaviour: the case of dissipative maps

Details On the correct entropic form for systems with power-law behaviour: the case of dissipative maps On the correct entropic form for systems with power-law behaviour: the case of dissipative maps

2002-01-25

arxiv.org/abs/cond-mat/0201464v1

Physics

Condensed Matter

Statistical Mechanics

16 pages Revtex, 6 postscript Figs

Scientific paper

Maximum entropy principle does not seem to distinguish between the use of Tsallis and Renyi entropies as either of them may be used to derive similar power-law distributions. In this paper, we address the question whether the Renyi entropy is equally suitable to describe those systems with power-law behaviour, where the use of the Tsallis entropy is relevant. We discuss a specific class of dynamical systems, namely, one dimensional dissipative maps at chaos threshold and make our study from two aspects: i) power-law sensitivity to the initial conditions and the rate of entropy increase, ii) generalized bit cumulants. We present evidence that the Tsallis entropy is the more appropriate entropic form for such studies as opposed to Renyi form.

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