schr3.m

求解量子力学的薛定谔方程

%> The file <schr3.m) calculates bound state eigenvalues/functions 
%> for a Schroedinger particle in 1D. The potential is nonzero only on
%> a finite symmetric interval [-A,A].  
%> BC: continuity with bound state exponentials outside [-A,A] and
%> continuity of logarithmic derivative at an interior point  X = B.
%> Method: Shooting from -A and A to X = B using the Numerov algoritm
%> for a lattice of energy values. The zeros of the Wronski determinant
%> at  X = B gives the eigenvalues. The search for solutions is automatic.
%> The method cannot resolve nearly degenerate eigenvalues! 
%> It is likely to miss very weakly bound states!
%> Uses files <wkb.m>, <numerov1.m>, <findzero.m> ......
%>
%>