Local Equivalence of Rank-Two Quantum Mixed States
arXiv:0711.1210 · doi:10.1088/1751-8113/40/36/011
Abstract
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.
arXiv comment6 pages
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