The microscopic theory of irreversible processes that we developed is summarized and illustrated, using as a simple example the Friedrichs model. Our approach combines the Poincaré's point of view… Expand

Abstract Recently Prigogine, Henin and George have introduced the concept of subdynamics: the evolution of a dynamical system can be decomposed under very general conditions into independent… Expand

We present a constructive procedure to deal with large quantum systems in the thermodynamic limit. Starting with a discrete spectrum, we perform a complete decomposition of the evolution into… Expand

Resume Les equations cinetiques pour les modes normaux d'un reseau anharmonique interagisant par des processus elementaires a 3 phonons sont etudiees de maniere detaillee tant dans le cas classique… Expand

It is difficult to incorporate the concept of interacting physical particles in the frame of conventional quantum mechanics. It comes from the fact that in this formalism the Hamiltonian plays a dual… Expand

Synopsis The transverse electrical conductivity of an electron-phonon system under a strong static magnetic field is calculated up to the second order in the electron-phonon interaction starting from… Expand

A dynamical formulation of quasi-particles corresponding to complex poles of Green's functions has been provided in the frame of “Liapounov” transformations in a superoperator formalism. In this… Expand