Quantum theory of ghosts

Spiritualists and physicists came together to try to rationalise the theory of ghosts using quantum mechanics ideology. In quantum physics a particle is said to be at a point in space (and one may assume time) based on a probability. If probability is not a certainty, and represented by a probability curve, then that particle may also exist at another point in space and time. If particles for one object don't fly apart (molecular cohesion), then we can assume a whole body may have a probability of being at a point in space and time. Therefore, ghosts, it is postulated, are merely being existing off their natural probability curve.