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Entanglement criteria and full separability of multi-qubit quantum states (1009.3782v2)
Published 20 Sep 2010 in quant-ph
Abstract: We introduce an entanglement criterion to exclude full separability of quantum states. We present numerical evidence that the criterion is necessary and sufficient for the class of GHZ diagonal three-qubit states and estimate the volume of bound entangled states within this class. Finally, we extend our approach to bound entangled states which are not GHZ diagonal.