Local Equivalence of Rank-Two Quantum Mixed States

Details Local Equivalence of Rank-Two Quantum Mixed States Local Equivalence of Rank-Two Quantum Mixed States

2007-11-08

arxiv.org/abs/0711.1210v1

J. Phys. A 40 (2007) 11113-11117

Physics

Quantum Physics

6 pages

Scientific paper

10.1088/1751-8113/40/36/011

We investigate the equivalence of quantum mixed states under local unitary transformations. For a class of rank-two mixed states, a sufficient and necessary condition of local equivalence is obtained by giving a complete set of invariants under local unitary transformations, such that two states in this class are locally equivalent if and only if all these invariants have equal values for them.

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