Vortex formation and hidden vortices in dipolar Bose-Einstein condensates

We examine vortex formation in dipolar Bose-Einstein condensates (BECs) with rotating double-well (DW) trap potential. For this purpose, we solve a two-dimensional, nonlocal Gross-Pitaevskii equation numerically. We obtain the critical rotation frequency (Ωc) for vortex formation in dipolar BECs for two different species and three different interaction strengths in each case. We also study hidden vortices, which are positioned along the DW potential, for all possible cases.