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Matrix Tensor Product Approach to the Equivalence of Multipartite States under Local Unitary Transformations
Xiu-Hong Gao, Sergio Albeverio, Shao-Ming Fei and Zhi-Xi Wang
The equivalence of multipartite quantum mixed states under local unitary transformations is studied. A criterion for the equivalence of non-degenerate mixed multipartite quantum states under local unitary transformations is presented.