paper

On the propagation of a perturbation in an anharmonic system

arXiv:math-ph/0607023 · doi:10.1007/s10955-007-9278-0

Abstract

We give a not trivial upper bound on the velocity of disturbances in an infinitely extended anharmonic system at thermal equilibrium. The proof is achieved by combining a control on the non equilibrium dynamics with an explicit use of the state invariance with respect to the time evolution.

14 pages

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