Bound States of the Hydrogen Atom in the Presence of a Magnetic Monopole   Field and an Aharonov-Bohm Potential
  In the present article we analyze the bound states of an electron in a Coulomb field when an Aharonov-Bohm field as well as a magnetic Dirac monopole are present. We solve, via separation of variables, the Schr\"odinger equation in spherical coordinates and we show how the Hydrogen energy spectrum depends on the Aharonov-Bohm and the magnetic monopole strengths. In passing, the Klein-Gordon equation is solved. 
Victor M. Villalba