(a) Concurrence of the system for different initial states with T = 0.5, Γ = 1.2. (b) Concurrence of the system for different temperature T with θ = 0, Γ = 1.2. (c) Concurrence of the system for different intracollision strengths Γ with θ = π/40, T = 0.5. The other parameters are κ = λ₁ = λ₂ = 0.01, M = 0.05, ω = 1 in the three plots. (d) Concurrence of the system for different collision strengths κ, λ₁, λ₂, M with θ = π/40, T = 0.5, Γ = 1.2, ω = 1.