par Karpov, Evgueni ;Ordóñez, Gonzalo G.E.;Petrosky, Tomio T.Y.;Prigogine, Ilya
Référence Physics of Particles and Nuclei Letters, 1, 116, page (8-15)
Publication Publié, 2003
Article révisé par les pairs
Résumé : We have obtained a microscopic expression for entropy in terms of H function based on nonunitary Λ transformation which leads from the time evolution as a unitary group to a Markovian dynamics and unifies the reversible and irreversible aspects of quantum mechanics. This requires a new representation outside the Hilbert space. In terms of H, we show the entropy production and the entropy flow during the emission and absorption of radiation by an atom. Analyzing the time inversion experiment, we emphasize the importance of pre- and postcollisional correlations, which break the symmetry between incoming and outgoing waves. We consider the angle dependence of the H function in a three-dimensional situation. A model including virtual transitions is discussed in a subsequent paper