ABSTRACT
The time-dependent Schrödinger equation (SE) or the wave equation may be written as
i x,t H x,tη ∂∂ ( ) = ( )t Ψ Ψ , (7.1)
where x contains, in principle, all the space and spin coordinates of all particles of the system. Using Equations 1.12 through 1.14 it is easy to check that a wave packet satis›es the wave equation.
