We report on the experimental violation of multipartite Bell inequalities by entangled states of trapped ions. First we consider resource states for measurement-based quantum computation of between 3 and 7 ions and show that all strongly violate a Bell-type inequality for graph states, where the criterion for violation is a sufficiently high fidelity. Second we analyze GHZ states of up to 14 ions generated in a previous experiment using stronger Mermin-Klyshko inequalities, and show that in this case the violation of local realism increases exponentially with system size. These experiments represent a violation of multipartite Bell-type inequalities of deterministically prepared entangled states. In addition, the detection loophole is closed.
@article{arxiv.1312.4810,
title = {Experimental violation of multipartite Bell inequalities with trapped ions},
author = {B. P. Lanyon and M. Zwerger and P. Jurcevic and C. Hempel and W. Dür and H. J. Briegel and R. Blatt and C. F. Roos},
journal= {arXiv preprint arXiv:1312.4810},
year = {2014}
}
Comments
Significantly extended split off of arXiv:1308.5102