info:eu-repo/semantics/article
Decoherence: a closed-system approach
Fecha
2013-08-20Registro en:
Fortin, Sebastian Ezequiel; Lombardi, Olimpia Iris; Castagnino, Mario Alberto G. J.; Decoherence: a closed-system approach; Soc Brasileira Fisica; Brazilian Journal Of Physics; 43; 4; 20-8-2013; 1-18
0103-9733
Autor
Fortin, Sebastian Ezequiel
Lombardi, Olimpia Iris
Castagnino, Mario Alberto G. J.
Resumen
The aim of this paper is to review a new perspective about decoherence, according to which formalisms originally devised to deal just with closed or open systems can be subsumed under a closed-system approach that generalizes the traditional account of the phenomenon. This new viewpoint dissolves certain conceptual difficulties of the orthodox open-system approach but, at the same time, shows that the openness of the quantum system is not the essential ingredient for decoherence, as commonly claimed. Moreover, when the behavior of a decoherent system is described from a closed-system perspective, the account of decoherence turns out to be more general than that supplied by the open-system approach, and the quantum-to-classical transition defines unequivocally the realm of classicality by identifying the observables with classical-like behavior.