Fractal entropy of a chain of nonlinear oscillators.
We study the time evolution of a chain of nonlinear oscillators. We focus on the fractal features of the spectral entropy and analyze its characteristic intermediate time scales as a function of the nonlinear coupling. A Brownian motion is recognized with an analytic power-law dependence of its diffusion coefficient on the coupling.
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Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy.
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