Measurement-induced nonlocality in the W and Greenberger–Horne–Zeilinger superposition states*
Lin Qina), Bai Yan-Kuib), Ye Ming-Yonga)†, Lin Xiu-Mina)
       
Δ N = N ( ρ a | bcd ···)–( n –1) N ( ρ a | b ) varies as a function of cos 2 θ . When cos 2 θ ∈ [1/3,1] there is Δ N ≥ 0 for any n , which means the monogamy relation of MIN in these states is satisfied.