Anisotropic Invariance and the Distribution of Quantum Correlations
Anisotropic Invariance and the Distribution of Quantum Correlations
We report the discovery of two new invariants for three-qubit states which, similarly to the three-tangle, are invariant under local unitary transformations and permutations of the parties. These quantities have a direct interpretation in terms of the anisotropy of pairwise spin correlations. Applications include a universal ordering of pairwise quantum …