Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.3: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Genuine hidden nonlocality of three-qubit bound entangled quantum states — •Lucas Tendick, Hermann Kampermann, and Dagmar Bruss — Institut für Theoretische Physik III, Heinrich-Heine-Universität Düsseldorf, D-40225 Düsseldorf, Germany

We discuss the relation between entanglement and nonlocality in the hidden nonlocality scenario, with respect to three-qubit bound entangled states. Hidden nonlocality is the activation of nonlocality by the use of local filters for a given state that admits a local hidden-variable model in the simple Bell scenario. We present some fully-biseparable three-qubit bound entangled state with a local model for the most general (non-sequential) measurements. Hence, we are dealing with the most general form of hidden nonlocality, so-called genuine hidden nonlocality. However, the local model breaks down when suitable local filters were applied, witnessed by the violation of a simple tripartite Bell inequality. This shows that the state reveals its nonlocal properties, when a sequence of suitable measurements are applied. Hence, genuine hidden nonlocality does not imply entanglement distillability.