Vector kink-dark complex solitons in a three-component Bose–Einstein condensate

Yan Li,Yan-Hong Qin,Li-Chen Zhao,Zhan-Ying Yang,Wen-Li Yang

Figure 1. Phase diagram for different types of KDCS profiles. It is shown in two relative phases φ1 and φ2. It is seen that there are three types of KDCS excitations. The blue line corresponds to the type-I KDCS profiles: a bubble or droplet with a density dip in the center of density distribution. The red lines correspond to the type-II KDCS profiles: a density dip on the right or left side of a bubble (droplet). The regime except the points on the three lines corresponds to the type-III KDCS profiles: the general kink-dark complex solitons. For the intersection of the three lines, the density profiles are similar to three dark solitons. The blue triangle, red hollow circle, black pentagram in the phase diagram correspond to the first, the second and the third panel in figure 2, respectively. The parameters are v1 = v2 = v3 = 0, d1 = −20, d2 = 0, d3 = 20.