title: Universal decay of the classical Loschmidt echo of neutrally stable mixing dynamics.
abstract: We provide analytical and numerical evidence that the classical mixing systems, which lack exponential sensitivity on initial conditions, exhibit universal decay of the Loschmidt echo which turns out to be a function of a single scaled time variable delta(2/5)t, where delta is the strength of perturbation. The role of dynamical instability and entropy production is discussed.
authors.affiliation: Center for Nonlinear and Complex Systems, Università degli studi dell'Insubria, Como, Italy.
authors.forename: Giulio
authors.initials: G
authors.lastname: Casati
authors.forename: Tomaz
authors.initials: T
authors.lastname: Prosen
authors.forename: Jinghua
authors.initials: J
authors.lastname: Lan
authors.forename: Baowen
authors.initials: B
authors.lastname: Li