Measurement-induced nonlocality in the W and Greenberger-Horne-Zeilinger superposition states

Measurement-induced nonlocality (MIN) is a newly defined quantity to measure correlations in bipartite quantum states Luo S and Fu S 2011 Phys. Rev. Lett. 106 120401. MIN in the n-qubit W and Greenberger-Horne-Zeilinger (GHZ) superposition states is considered. It is revealed that n=3 and n≥ 4 states have very different characteristics, especially the monogamy relation about MIN, and the monogamy equality of MIN is held in all n-qubit W states (n≥ 3).