Detecting k -nonseparability via local uncertainty relations
Yan Hong, Shunlong Luo · Physical Review A · 2016
We investigate $k$-nonseparability of $n$-partite quantum states which is an important kind of correlations characterizing multipartite entanglement. We derive some $k$-nonseparability criteria in the form of variance and quantum Fisher information, and illustrate their complementary features in the detection of $k$-nonseparability through several examples.