I don’t know if this is even the right/best sub to pose this question, but I was just within a thought experiment today and started thinking about this question. At absolute zero, it is theorized that everything slows down to a point where atoms are motionless. In this state, time itself is only observed by an outside source.

Let’s say that your average freezer was capable of creating an atmosphere of absolute zero within it. Objects put in that environment will slow to point of no motion, in essence “freezing time” for the object. Time itself only exists at this point to the outside observer.

Now let’s say that the average freezer used to produce a temperature of absolute zero, is our observable universe. If the universe became devoid of heat and cooled to absolute zero, time for us would stop. Assuming there is no outside observer of our universe, time itself is directly related to heat for us inside the freezer.

Does this make sense at all?