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MiS Preprint
26/2006

Invariants for a Class of Nongeneric Three-qubit States

Bao-Zhi Sun and Shao-Ming Fei

Abstract

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.

Received:
Mar 13, 2006
Published:
Mar 13, 2006
PACS:
03.67.-a, 02.20.Hj, 03.65.-w
Keywords:
invariant, quantum state, local unitary transformat

Related publications

inJournal
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