• We try to give a physical meaning to the wave function or quantum state of a system, apart from being a very efficient tool for predicting results of measurements on that system. In other words, we ask: what does it mean for a system outside the laboratories to have a wave function? We first explain why two possible, and probably common, answers to that question do not really answer it. Then, we explain how the de Broglie-Bohm theory does give a satisfactory meaning to the quantum state outside the laboratories, while avoiding the problems faced by the other answers.

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  • I am sorry; I was away for a few days and could not respond. I think at some point in the discussion, one has to agree to disagree and let others judge the merits of our arguments. That is why I have written a book (to be published by Springer) “Making sense of QM”, where I explain in detail de Broglie-Bohm’s theory and reply to the usual…[Read more]

  • The de Broglie-Bohm theory is not an alternative to ordinary quantum mechanics or an interpretation of it but a rational version of quantum mechanics: while the latter provides an accurate algorithm for predicting results of measurements, the de Broglie-Bohm theory is a real theory about what is going on in the world from which the quantum…[Read more]

  • The goal of this paper is to give a pedagogical introduction to Bell’s theorem and its implication for our view of the physical world, in particular how it establishes the existence of non local effects or of actions at a distance. We also discuss several misunderstandings of Bell’s result and we will explain how the de Broglie-Bohm theory allows…[Read more]