Warsaw Spacetime Colloquium: Carlo Rovelli (2 October on Zoom)

On Friday, 2 October, Carlo Rovelli (Aix-Marseille University) will give a talk entitled “Why can we decide what we shall do tomorrow, but we cannot decide what we did yesterday? Time reversibility and the physics of an agent” (abstract below).

The meeting will take place online on Zoom (16:00-18:00 CET). If you have not registered yet, you can do so by sending a message to antonio.vassallo@pw.edu.pl. The program for the winter semester can be found here.

Abstract:
Much of the confusion in the philosophy of spacetime stems from the failure to recognize that ‘space’ and ‘time’ (and a fortiori ‘spacetime’) are layered concepts used to denote a variety of different notions. I disentangle the different uses of these words, and discuss what we understand about the different layers in contemporary physics. In the second part of the talk I discuss in particular the arrow of time: the reason why the past is fixed and the future open. I show that we remember the past (not the future) and we can affect the future (not the past) because of the entropy gradient. Hence the fact that the past is fixed and the future is open is a macroscopic, statistical, phenomenon.