Coreless vortex formation in a spinor Bose-Einstein condensate
  Coreless vortices were phase-imprinted in a spinor Bose-Einstein condensate. The three-component order parameter of F=1 sodium condensates held in a Ioffe-Pritchard magnetic trap was manipulated by adiabatically reducing the magnetic bias field along the trap axis to zero. This distributed the condensate population across its three spin states and created a spin texture. Each spin state acquired a different phase winding which caused the spin components to separate radially. 
A.E. Leanhardt, Y. Shin, D. Kielpinski, D.E. Pritchard, W. Ketterle