Vortex -- Kink Interaction and Capillary Waves in a Vector Superfluid
  Interaction of a vortex in a circularly polarized superfluid component of a 2d complex vector field with the phase boundary between superfluid phases with opposite signs of polarization leads to a resonant excitation of a ``capillary'' wave on the boundary. This leads to energy losses by the vortex--image pair that has to cause its eventual annihilation. 
A.A. Nepomnyashchy and L.M. Pismen (Technion -- Israel Institute of   Technology)