Normal mode spectra of multi-Skyrmions

The Skyrme model of nuclear physics requires quantization if it is to match observed nuclear properties. The computation of the normal mode spectra of multi-Skyrmion solutions isa crucial first step toward this goal. Results for baryon number B = 2, 3, and 4 Skyrme solitons are presented here. All t hree spectra possess the same remarkable structure, with the lowest energy modes lying in those representations expected from an approximate correspon dence between Skyrmions and BPS monopoles. In each case, the next mode up i s the "breather", and above that lie higher multipole breathing modes.