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.
Butta P., Caglioti E., Di Ruzza S., Marchioro C. (2007). On the propagation of a perturbation in an anharmonic system. JOURNAL OF STATISTICAL PHYSICS, 127(2), 313-325 [10.1007/s10955-007-9278-0].
On the propagation of a perturbation in an anharmonic system
Di Ruzza S.;
2007-01-01
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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