Mixtures of two-component BECs with long-range monopolar interaction

This paper analyzes the properties of two-component Bose–Einstein Condensates (BECs) with long-range monopolar interaction by means of exact numerical simulation. The effects of external trap potential, inter-component s-wave scattering, monopolar interaction, and particle numbers on the density of BECs are investigated. It is shown that the trap potential dramatically affects density profiles compared to the other three properties, and atoms with the small intra-component s-wave scattering length are squeezed out when the monopolar interaction of these atoms is not large enough. Effective zero interaction point, where the s-wave scattering repulsive interaction is neutralized by monopolar attractive interaction, is found. Finally, a correction to the conclusion of Ref. [5] is offered, which is obtained by variational methodology in self-trapped regime.