Chaos and Non-Archimedean metric in the Bernoulli map
  Ultrametric concepts are applied to the Bernoulli map, showing the adequateness of the non-Archimedean metrics to describe in a simple and direct way the chaotic properties of this map. Lyapunov exponent and Kolmogorov entropy appear to find a simpler explanation. A p-adic time emerges as a natural consequence of the ultrametric properties of the map. 
Jesus San-Martin and Oscar Sotolongo-Costa