CONICET | Buscador de Institutos y Recursos Humanos

We study the dynamics of a classical disordered macroscopic model completelyisolated from the environment reproducing, in a classical setting, the "quantumquench" protocol. We show that, depending on the pre and post quench parametersthe system approaches equilibrium, succeeding to act as a bath on itself, orremains out of equilibrium, in two different ways. In one of the latter, thesystem stays confined in a metastable state in which it undergoes stationarydynamics characterised by a single temperature. In the other, the system agesand its dynamics are characterised by two temperatures associated toobservations made at short and long time differences (high and lowfrequencies). The parameter dependence of the asymptotic states is rationalisedin terms of a dynamic phase diagram with one equilibrium and two out ofequilibrium phases. Aspects of pre-thermalisation are observed and discussed.Similarities and differences with the dynamics of the dissipative model arealso explained.