Local Invariants for a Class of Mixed States
Sergio Albeverio, Shao-Ming Fei, Debashish Goswami
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 mixed states. It is shown 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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