Density map and profiles of bubble-droplet state, the upper one is the bubble (sort of dark soliton) component, the lower one is droplet (bright soliton) component. It is seen that the structures are constituted of a domain wall combined with a paralleled anti-domain wall. The parameters are λ 1 = λ 2 = 0.01 , k 1 = k 2 = 0.02 , c 1 = c 2 = 1 , − α 1 = α 2 = 4 .