Potential energy of Yang-Mills vortices in three and four dimensions

We calculate the energy of a Yang-Mills vortex as function of its magnetic flux or as the Wilson loop surrounding the vortex center. The calculation i s performed in the one-loop approximation. A parallel line with a potential as function of the Polyakov at nonzero temperatures is drawn. We find that quantized Z(2) vortices are dynamically preferred though vortices with arb itrary fluxes cannot be ruled out.