par Reignier, Jean
Référence Annales de la fondation Louis de Broglie, 29, SPEC. ISS. 1, page (807-835)
Publication Publié, 2004
Article révisé par les pairs
Résumé : Space and Time are essential ways by which humans think about their environment. The mathematical parameters associated with these concepts appear nearly in the same way in the formulation of both the classical and the quantum theories, but cer tainly not any more at the level of our intuitive understanding of their results. This paper aims to explain why it can be so, starting from an analysis of the way some basic principles are introduced in these theories. These principles are: localisation in space, isolation of a system, state of an isolated system, and causality. The problem of quantum non-locality is analysed again. It is shown that localising a microscopic entity can depend on the kind of localising experiment one performs. I give an example of an entity which will be considered as localised or alternatively as non-localised, depending on the localising experiment. I also discuss the ideas of time and of duration in quantum physics. I show that if duration can be properly defined for a statistical set of particles, it is not so for the individuals.