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 timescales 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. 
A. Scardicchio, P. Facchi, S. Pascazio