General relativity, of course, suggests that every point mass is at the centre of a gravitational potential well - this is what causes the effect known as gravitation. What it doesn't tell us is *why* this potential well exists. Quantum mechanics tells us that each particle is actually a wave function, and rather than being in a singular location, it is spread across a range of locations, with various probabilities of being found at each point. Now, what if the potential well hypothesised by general relativity is simply required by quantum mechanics in order to stop particles existing all over the Universe at once? That is to say, a particle is fundamentally required to be at the centre of its own potential well, so that its wave function may be confined to a very limited range. Could this not provide justification for gravitation in quantum theory?

I'm not particularly well educated in either field, so I'd appreciate any comments on this by those who are.