On the propagation of a perturbation in an anharmonic system
- Autori: Butta P.; Caglioti E.; Di Ruzza S.; Marchioro C.
- Anno di pubblicazione: 2007
- Tipologia: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/574191
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.