Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 18: Quantum Information: Concepts and Methods III

Q 18.6: Vortrag

Dienstag, 1. März 2016, 12:15–12:30, e214

Extreme violation of local realism in hypergraph states — •Mariami Gachechiladze, Costantino Budroni, and Otfried Gühne — University if Siegen, Siegen, Germany

Hypergraph states form a family of multiparticle quantum states that generalizes the well-known concept of Greenberger-Horne-Zeilinger states, cluster states, and more broadly graph states. We study the nonlocal properties of quantum hypergraph states. We demonstrate that the correlations in hypergraph states can be used to derive various types of nonlocality proofs, including Hardy-type arguments and Bell inequalities for genuine multiparticle nonlocality. Moreover, we show that hypergraph states allow for an exponentially increasing violation of local realism which is robust against loss of particles. Our results suggest that certain classes of hypergraph states are novel resources for quantum metrology and measurement-based quantum computation.