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Entropy 2013, 15(12), 5178-5222; doi:10.3390/e15125178

Generalized Statistical Mechanics at the Onset of Chaos

Instituto de Física y Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica Ciudad Universitaria, Ciudad de Mexico 04510, Mexico
Received: 4 October 2013 / Revised: 9 November 2013 / Accepted: 11 November 2013 / Published: 27 November 2013
(This article belongs to the Special Issue Complex Systems)

Abstract

Transitions to chaos in archetypal low-dimensional nonlinear maps offer real and precise model systems in which to assess proposed generalizations of statistical mechanics. The known association of chaotic dynamics with the structure of Boltzmann–Gibbs (BG) statistical mechanics has suggested the potential verification of these generalizations at the onset of chaos, when the only Lyapunov exponent vanishes and ergodic and mixing properties cease to hold. There are three well-known routes to chaos in these deterministic dissipative systems, period-doubling, quasi-periodicity and intermittency, which provide the setting in which to explore the limit of validity of the standard BG structure. It has been shown that there is a rich and intricate behavior for both the dynamics within and towards the attractors at the onset of chaos and that these two kinds of properties are linked via generalized statistical-mechanical expressions. Amongst the topics presented are: (i) permanently growing sensitivity fluctuations and their infinite family of generalized Pesin identities; (ii) the emergence of statistical-mechanical structures in the dynamics along the routes to chaos; (iii) dynamical hierarchies with modular organization; and (iv) limit distributions of sums of deterministic variables. The occurrence of generalized entropy properties in condensed-matter physical systems is illustrated by considering critical fluctuations, localization transition and glass formation. We complete our presentation with the description of the manifestations of the dynamics at the transitions to chaos in various kinds of complex systems, such as, frequency and size rank distributions and complex network images of time series. We discuss the results. View Full-Text
Keywords: low dimensional chaos; statistical physics; complex systems low dimensional chaos; statistical physics; complex systems
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Robledo, A. Generalized Statistical Mechanics at the Onset of Chaos. Entropy 2013, 15, 5178-5222.

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