Salle des Conférences (R229), Centre Universitaire des Saints-Pères, 45 rue des Saints-Pères, 75006 Paris
Etienne Klein, Laboratoire des Recherches sur les Sciences de la Matière, CEA.
What does the “arrow of time” stand for?
One hundred and thirty years after the work of Ludwig Boltzmann on the interpretation of the irreversibility of physical phenomena, and one century after Einstein’s formulation of Special Relativity, we are still not sure what we mean when we talk of “time” or “arrow of time”. We shall show that one source of this difficulty is our tendency to confuse, at least verbally, time and becoming, that is the course of time and the arrow of time, two concepts that the formalisms of modern physics are careful to distinguish.