Thermodynamics of chaotic relaxation processes
arXiv:2404.09130 · doi:10.1103/PhysRevE.110.024215
Abstract
The established thermodynamic formalism of chaotic dynamics, valid at statistical equilibrium, is here generalized to systems out of equilibrium, that have yet to relax to a steady state. A relation between information, escape rate, and the phase-space average of an integrated observable (e.g. Lyapunov exponent, diffusion coefficient) is obtained for finite time. Most notably, the thermodynamic treatment may predict the phase-space profile of any finite-time integrated observable from the leading and subleading eigenfunctions of the Perron-Frobenius/Koopman transfer operator. Examples of that equivalence are shown, and the theory is tested analytically on the Bernoulli map, while numerically on the perturbed cat map, the Hénon map, and the Ikeda map, all paradigms of chaos.
arXiv comment18 pages, 13 figures
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