Observable upper and lower bounds on multipartite entanglement for arbitrary system sizes are constructed from state purities and correlation functions by extending bipartite results via strong subadditivity and monogamy relations.
We then choose anotherk-particle clusterX 2 k that does not containX 1
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Observable measures of multipartite entanglement
Observable upper and lower bounds on multipartite entanglement for arbitrary system sizes are constructed from state purities and correlation functions by extending bipartite results via strong subadditivity and monogamy relations.