Hi, I'm new to QM (and phy forum :D), and studyin alone..! so, if you consider the free particle, it does not have a solution in the form of separable solutions(??). Which means that if the same experiment (independent, of course,) is carried out total energy is different each time at t = ta (for constant a). what does this mean? it seems to me like energy is created and destroyed. Is it so? or does it have to do som'n with uncertainness principle??? help me, thax a lot.