Interpretations and significations in quantum physics

The debate on the interpretation of quantum mechanics is, today, somewhat different from that of the "founding" period of the theory. Two factors give account of these modifications. The first one is the enrooting of quantum conceptions in the physicists thought, favoured by the systematic and fruitful use of quantum theory in atomic and subatomic physics. The second one is related to developments on the knowledge of quantum systems that have occurred since about twenty years, and have led to consider as physical facts statements that appeared formerly to be more related to interpretation, with free options or even to speculation. What is the meaning of the theoretical statements and concepts of quantum physics? and how this last itself has been modified? What does "interpretation" mean? Such are the questions that serve as a guide for the exposition. We undertake to clarify the respective relevance, in questions of meaning, of physical aspects (basically, the conceptual and theoretical contents), and of philosophical perspectives. This distinction appears today sharper than it was at the time when quantum mechanics was established, which allows us to deepen our understanding of both, and they in turn mutually enrich themselves in such a clarification. We conclude by an attempt to sketch a realist conception in terms of a "world of quantum objects".