The nature of time in classical and quantum physics

The notion of time depends on the particular physical theory. Theoretical revolutions in physics have often required to revise it. The notion in classical mechanics is different from that in general relativity and seems to be changed again in the light of quantum theory. The goal of the project is to investigate philosophical issues concerning the nature and role of time in classical and quantum physics. We will consider the meaning of symmetries of the theory like time-reversal invariance and more generally the space-time symmetries (like Galilean, Lorentzian or general invariance) in relation to the ontology of the theory. In the first part, we will work on the ongoing debate on the meaning of time-reveral invariance in classical theories. Then we will take this further up in the context of quantum theories. In the third part, we will consider the apparent clash between Lorentz invariance and non-locality and the implications for the notion of time. Finally, we will consider canonical quantum gravity.