New developments in the quantization of supersymmetric solitons (kinks, vortices and monopoles)

We discuss the one-loop quantum corrections to the mass M and central charge Z of supersymmetric (SUSY) solitons: the kink, the vortex and the monopole. Contrary to previous expectations and published results, in each of these cases there are nonvanishing quantum corrections to the mass. For the N = 1 kink and the N = 2 monopole a new anomaly in Z rescues BPS saturation (M = Z); for the N = 2 vortex, BPS saturation is rescued for two reasons: the quantum fluctuations of the Higgs field acquire a nontrivial phase due to the winding of the classical solution, and a fermionic zero mode used in the literature is shown not to be normalizable. (author)