Local Unitary Invariants for Multipartite Quantum Systems
Jing Wang, Ming Li, Shao-Ming Fei,and Xianqing Li-Jost
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Submission date: 15. Sep. 2014
published in: Communications in theoretical physics, 62 (2014) 5, p. 673-676
DOI number (of the published article): 10.1088/0253-6102/62/5/07
PACS-Numbers: 03.67.-a, 02.20.Hj, 03.65.-w
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We present an approach of constructing invariants under local unitary transformations for multipartite quantum systems. The invariants constructed in this way can be complement to that in [Science 340 (2013) 1205-1208]. Detailed examples are given to compute such invariant in detail. It is shown that these invariants can be used to detect the local unitary equivalence of degenerated quantum states.