Modulus squares of the overlap for the four initial states of atom when we choose δ₀ = 0, Ω₀ = 0, Ω₁ = 4.0κ and different values of δ₁: (a) δ₁ = 0.1κ, (b) δ₁ = 0.5κ, (c) δ₁ = 1.5κ, (d) δ₁ = 3.5κ. The initial states are ground (g, black square), excited (e, red dot), superposition (s, blue triangle), and maximally mixed (m, green star) states.