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Diffusion crossover between q statistics and Boltzmann-Gibbs statistics in the classical inertial α-XY ferromagnet

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We study the angular diffusion in a classical d-dimensional inertial XY model with interactions decaying with the distance between spins as r^{-α}, with α⩾0. After a very short-time ballistic regime, with σ_{θ}^{2}∼t^{2}, a superdiffusive regime, for whi... ...