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Non-Poisson dichotomous noise: higher-order correlation functions and aging

Abstract

We study a two-state symmetric noise, with a given waiting time distribution ψ(τ)\psi (\tau), and focus our attention on the connection between the four-time and the two-time correlation functions. The transition of ψ(τ)\psi (\tau) from the exponential to the non-exponential condition yields the breakdown of the usual factorization condition of high-order correlation functions, as well as the birth of aging effects. We discuss the subtle connections between these two properties, and establish the condition that the Liouville-like approach has to satisfy in order to produce a correct description of the resulting diffusion process

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