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Bell Inequalities for Graph States
Otfried Guehne, Geza Toth, Philipp Hyllus +1
We investigate the non-local properties of graph states. To this aim, we derive a family of Bell inequalities which require three measurement settings for each party and are maxima…
Two measurement settings can suffice to verify multipartite entanglement
Geza Toth, Otfried Guehne
We present entanglement witnesses for detecting genuine multi-qubit entanglement. Our constructions are robust against noise and require only two local measurement settings, indepe…
Entanglement Witnesses in Spin Models
Geza Toth
We construct entanglement witnesses using fundamental quantum operators of spin models which contain two-particle interactions and posses a certain symmetry. By choosing the Hamilt…
Detecting Genuine Multipartite Entanglement with Two Local Measurements
Geza Toth, Otfried Guehne
We present entanglement witness operators for detecting genuine multipartite entanglement. These witnesses are robust against noise and require only two local measurement settings…