This is just speculation for fun, but OK, I will bite. You have a compressed gas, so, low entropy, then it starts expanding. The area where it started expandin

This is just speculation for fun, but OK, I will bite. You have a compressed gas, so, low entropy, then it starts expanding. The area where it started expanding has less possible states that the area around, but just because the area around is bigger, nothing to do with the relative position itself. If the number of states are associated to gravity somehow, then gravity will be bigger the further you go from the center. Because we are brainstorming in creative mode, I will add a bonus: if the number of possible states increase gravity, maybe, the older the universe gets, the bigger is that influence all around, accelerating its expansion. I suppose that I will get my Nobel any day now ;-)