%0 Journal Article %J Physical Review A %D 2016 %T Detecting Consistency of Overlapping Quantum Marginals by Separability %A Jianxin Chen %A Zhengfeng Ji %A Nengkun Yu %A Bei Zeng %X The quantum marginal problem asks whether a set of given density matrices are consistent, i.e., whether they can be the reduced density matrices of a global quantum state. Not many non-trivial analytic necessary (or sufficient) conditions are known for the problem in general. We propose a method to detect consistency of overlapping quantum marginals by considering the separability of some derived states. Our method works well for the $k$-symmetric extension problem in general, and for the general overlapping marginal problems in some cases. Our work is, in some sense, the converse to the well-known $k$-symmetric extension criterion for separability. %B Physical Review A %V 93 %P 032105 %8 2016/03/03 %G eng %U http://arxiv.org/abs/1509.06591 %N 3 %R 10.1103/PhysRevA.93.032105