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On the propagation of a perturbation in an anharmonic system

P. Buttà·E. Caglioti·S. Di Ruzza·C. Marchioro
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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.

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P. Buttà, E. Caglioti, S. Di Ruzza, C. Marchioro. 2006-12-20. On the propagation of a perturbation in an anharmonic system. https://doi.org/10.1007/s10955-007-9278-0

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