Quantum computation and quantum information
Quantum computation and quantum information
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We classify local unitary equivalence classes of symmetric states via a classification oftheir local unitary stabilizer subgroups. For states whose local unitary stabilizer groupshave a positive number of continuous degrees of freedom, the classification is exhaustive.We show that local unitary stabilizer groups with no continuous degrees of freedom areisomorphic to finite subgroups of the rotation group SO(3), and give examples of stateswith discrete stabilizers.