摘要
A new vortex-lattice structure in rotating two-component Bose-Einstein condensates (BEC), was investigated. Each component carried a square vortex lattice, and to form a Skyrmion lattice, vortices in both components were filled by fluid of the other component. The structure was found to be stable, due to the relaxation of applied shear excitations back to the square structure. The results show that the stability of the square structure is proved by the response to the applied shear perturbations, and an interference technique shows the spatial offset between the two vortex lattices.