Formation, dynamics and stability of coreless vortex dipoles in   phase-separated binary condensates
  We study the motion of the Gaussian obstacle potential created by blue detuned laser beam through a phase-separated binary condensate in pancake-shaped traps. For the velocity of the obstacle above a critical velocity, we observe the generation of vortex dipoles in the outer component which can penetrate the inner component. This is equivalent to finite, although small, transport of outer component across the inner component. In the inner component, the same method can lead to the formation of coreless vortex dipoles. 
S. Gautam, P. Muruganandam, and D. Angom
cond-mat.quant-gas