“…Thus we need to know detailed information about the stationary state of this system. The structure of the ground state has been studied by solving two coupled Gross-Pitaevskii equations (GPEs) analytically or numerically [4,5,6,7,8,9,10,11,12,13,14,15]. The stationary solution of the GPEs gives the density profile of the condensate characterized by the parameters of the system-trapping frequencies, the number of atoms of each component, and three s-wave scattering lengths, a 1 , a 2 , and a 12 , which represent the interactions between like and unlike components.…”