Group-Theoretical Derivation of Aharonov-Bohm Phase Shifts
  The phase shifts of the Aharonov-Bohm effect are generally determined by means of the partial wave decomposition of the underlying Schrodinger equation. It is shown here that they readily emerge from an o(2,1) calculation of the energy levels employing an added harmonic oscillator potential which discretizes the spectrum. 
C. R. Hagen
math-ph math.MP quant-ph