I just looked it up, and it is a violation of the fact that the laws of physics should be reversible. So from the wave function at any point of time you should

I just looked it up, and it is a violation of the fact that the laws of physics should be reversible. So from the wave function at any point of time you should be able to reconstruct the wave at any other. My bad for having stuck thermodynamics in there at all. :-(