We sudy the creation of nonlocal states with ultracold atoms trapped in an optical lattice. We show that these states violate Bell inequality by measuring one- and two-body correlations. Our scheme only requires beam splitting operations and global phase shifts, and can be realized within the current technology, employing single-site addressing. This proposal paves the way to study multipartite nonlocality and entanglement in ultracold atomic systems.
@article{arxiv.1505.02902,
title = {Nonlocality with ultracold atoms in a lattice},
author = {S. Pelisson and L. Pezzé and A. Smerzi},
journal= {arXiv preprint arXiv:1505.02902},
year = {2016}
}