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Entanglement criteria and full separability of multi-qubit quantum states |
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| Authors: | Otfried Gü hne |
| Affiliation: | a Institut für Quantenoptik and Quanteninformation, Österreichische Akademie der Wissenschaften, Technikerstr. 21A, 6020 Innsbruck, Austria b Institut für Theoretische Physik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria c Fachbereich Physik, Universität Siegen, Walter-Flex-Str. 3, 57068 Siegen, Germany |
| 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. |
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