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MiS Preprint

Invariants for a Class of Nongeneric Three-qubit States

Bao-Zhi Sun and Shao-Ming Fei


We investigate the equivalence of quantum states under local unitary transformations. A complete set of invariants under local unitary transformations is presented for a class of non-generic three-qubit mixed states. It is shown that two such states in this class are locally equivalent if and only if all these invariants have equal values for them.

Mar 13, 2006
Mar 13, 2006
03.67.-a, 02.20.Hj, 03.65.-w
invariant, quantum state, local unitary transformat

Related publications

2006 Repository Open Access
Bao-Zhi Sun and Shao-Ming Fei

Invariants for a class of nongeneric three-qubit states

In: Communications in theoretical physics, 45 (2006) 6, pp. 1007-1010