(color online) The time evolution of P_R(t) for some interesting initial configurations: (a)–(d) N = 3 with (0100), while U₃/U₂ = −2 (the condition of Eq. (5) is satisfied) in (a) and (c), and U₃/U₂ = 2 (the condition of Eq. (5) is not satisfied) in (b) and (d); (e)–(h) N = 4 with U₃/U₂ = −1 (the condition of Eq. (5) is satisfied) in (e) and (g), and U₃/U₂ = 1/6 (the condition of Eq. (5) is not satisfied) in (f) and (h), (01000) is denoted by the blue line while (00100) is denoted by the red line.