Supertubes in field theories

To a domain wall or string object, Noether charge and topological spatial objects can be attracted, forming a composite Bogomolny-Prasad-Sommerfield (BPS) object. We consider two field theories and derive a new BPS bound on composite linear solitons involving multiple charges. Among the BPS objects supertubes appear when the wall or string tension is canceled by the bound energy, and could take an arbitrary closed curve. In our theories, supertubes manifest as Chern-Simons solitons, dyonic instantons, charged semilocal vortices, and dyonic instantons on the vortex flux sheet.