Interference patterns of the two dark–bright soliton interactions: (a) for dark-soliton component and (b) for bright-soliton component. The parameters are ρ₁ = ρ₂ = 1, κ₁ = −κ₂ = −6, q₀ = 10, x₁ = x₂ = 0, and ϕ₁ = ϕ₂ = π/4.