# Conservation of the square amplitude in the Schrodinger equation | ðŸ—– nosplit | â†‘ parent "Conservation laws in Schrodinger equations" | 46

Proof that the probability 1 is conserved by the time evolution:

- https://quantummechanics.ucsd.edu/ph130a/130_notes/node127.html from quantum physics by Jim Branson (2003).That proof also mentions that if the potential
`V`

is not real, then there is no conservation of probability! Therefore the potential*must*be real valued!