Formation and stability of coreless vortex dipoles in phase-separated binary condensates

We study the motion of the Gaussian obstacle potential created by a blue detuned laser beam through a phase-separated binary condensate in the pancake-shaped traps. We show that phase-separated binary condensates like 85Rb–87Rb, with appropriate interaction parameters, can be used experimentally to create obstacle assisted droplet and coreless vortex dipoles. We theoretically analyze the energetic stability of condensates with normal and coreless vortices. We confirm our analytic and semi-analytic results by numerical solutions of coupled Gross–Pitaevskii equations.

► We have studied the formation and stability of coreless vortex dipoles in phase-separated binary condensates.
► We have analyzed the creation of the obstacle assisted droplet, for adiabatically varying obstacle potential, using Thomas–Fermi (TF) approximation.
► We have analyzed the energetic stability of these structures in detail.
► We have shown that the formation of obstacle assisted droplet is crucial for the generation of coreless vortex dipoles.