@Leathercrop:
So God creates someone, knowing ALL their possible potentials of being beforehand, but it's the actual someone that decides which potential will be fulfilled.
The idea is that God also knows all the possibilities of all possible universes - Christian apologists call it "middle knowledge". It's part of Him knowing "all things". If you were given a choice between a slice of chocolate cake or carrot cake, He knows what you will pick, but also what you might pick in different circumstances. But you are still the one cchoosing.The knowledge of what you will choose doesn't mean the choice is removed from you.
I'm not sure how this maps onto quantum physics. I wouldn't go so far as to say God knows the position in momentum of all particles. I don't see a concept like superposition having any effect on God's knowledge. That is, if particles (or larger objects) can be in a superposition state, then that's just the way the universe works. In this case God would know and understand the superpositional state, as well as know when and how it would fall out of that state. Again, I don't know if this has any bearing on this topic though.