This review, of the understanding of quantum mechanics, is broad in scope, and aims to
reflect enough of the literature to be representative of the current state of the subject. To …

The interpretation of the concept of reduced state is a subtle issue that has relevant
consequences when the task is the interpretation of quantum mechanics itself. The aim of …

In this review, we present a rigorous construction of an algebraic method for quantum
unstable states, also called Gamow states. A traditional picture associates these states to …

We review some results in the theory of non-relativistic quantum unstable systems. We
account for the most important definitions of quantum resonances that we identify with …

We introduce a dynamical evolution operator for dealing with unstable physical process,
such as scattering resonances, photon emission, decoherence and particle decay. With that …

The problem of the classical limit of quantum mechanics consists in explaining how the
classical realm “emerges” from the quantum domain. Although along the history of quantum …

The analysis of the classical limit of quantum mechanics usually focuses on the state of the
system. The general idea is to explain the disappearance of the interference terms of …

If decoherence is an irreversible process, its physical meaning might be clarified by
comparing quantum and classical irreversibility. In this work we carry out this comparison …

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 …

The so-called classical limit of quantum mechanics is generally studied in terms of the
decoherence of the state operator that characterizes a system. This is not the only possible …