For example, this may occur in the Schrödinger equation, due to a potential energy hill.
This allows one to represent the Schrödinger equation in a matrix form.
The most accurate model so far comes from the Schrödinger equation.
The form of the Schrödinger equation depends on the physical situation (see below for special cases).
However, the Schrödinger equation does not directly say what, exactly, the wavefunction is.
They also appear when solving Schrödinger equation in three dimensions for a central force.
These ideas led to the development of the Schrödinger equation.
How changes over time is given by the Schrödinger equation.
After the collapse, the system again evolves according to the Schrödinger equation.
If we now leave this state alone, it will smoothly evolve in time according to the Schrödinger equation.