Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2008-01-18
Phys. Rev. E 77, 036213 (2008)
Physics
Condensed Matter
Statistical Mechanics
16 pages, 24 figures. Final published version. Minor corrections and typos added
Scientific paper
10.1103/PhysRevE.77.036213
We demonstrate that the dynamics towards and within the Feigenbaum attractor combine to form a q-deformed statistical-mechanical construction. The rate at which ensemble trajectories converge to the attractor (and to the repellor) is described by a q-entropy obtained from a partition function generated by summing distances between neighboring positions of the attractor. The values of the q-indices involved are given by the unimodal map universal constants, while the thermodynamic structure is closely related to that formerly developed for multifractals. As an essential component in our demonstration we expose, at a previously unknown level of detail, the features of the dynamics of trajectories that either evolve towards the Feigenbaum attractor or are captured by its matching repellor. The dynamical properties of the family of periodic superstable cycles in unimodal maps are seen to be key ingredients for the comprehension of the discrete scale invariance features present at the period-doubling transition to chaos. We make clear the dynamical origin of the anomalous thermodynamic framework existing at the Feigenbaum attractor.
Moyano Luis G.
Robledo Alberto
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