Published on August 26, 2025 5:07 PM GMT Let’s start with the classic Maxwell’s Demon setup. We have a container of gas, i.e. a bunch of molecules bouncing around. Down the middle of the container is a wall with a tiny door in it, which can be opened or closed by a little demon who likes to mess with thermodynamics researchers. Maxwell[1] imagined that the little demon could, in principle, open the door whenever a molecule flew toward it from the left, and close the door whenever a mol...
