Fermions in Yang-Mills potentials

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Abstract
It is shown that the magnetic monopole of 't Hooft and an isospinor fermion do not have any bound states. Further, the dyon of Julia and Zee considered as a fixed field configuration does not bind an isospinor fermion. An example is given of an infinite-energy solution of the pure Yang-Mills theory which when taken as a potential in a wave equation will confine the wave function.