In a schematic lattice gas models for vibrated dry granular media, we studied the dynamical response of the system to small perturbations of shaking amplitudes and its relations with the characteristic fluctuations. Strong off equilibrium features appear and a generalized version of the fluctuation dissipation theorem is introduced. The relations with thermal glassy systems and the role of Edwards’ compactivity are discussed.
Dynamical response functions in models of vibrated granular media / Nicodemi, Mario. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 82:(1999), pp. 3734-3737.
Dynamical response functions in models of vibrated granular media
NICODEMI, MARIO
1999
Abstract
In a schematic lattice gas models for vibrated dry granular media, we studied the dynamical response of the system to small perturbations of shaking amplitudes and its relations with the characteristic fluctuations. Strong off equilibrium features appear and a generalized version of the fluctuation dissipation theorem is introduced. The relations with thermal glassy systems and the role of Edwards’ compactivity are discussed.File in questo prodotto:
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