Generalized Ardehali-Bell inequalities for graph states
arXiv:0806.2769 · doi:10.1103/PhysRevA.77.032108
Abstract
We derive Bell inequalities for graph states by generalizing the approach proposed by Ardehali [Phys. Rev. A 46, 5375 (1992)] for Greenberger-Horne-Zeilinger (GHZ) states. Using this method, we demonstrate that Bell inequalities with nonstabilizer observables are often superior to the optimal GHZ-Mermin-type (or stabilizer-type) Bell inequalities.
6 pages, 3 figures