We study multipartite correlations and non-locality in an isotropic Ising ring under transverse magnetic field at both zero and finite temperature. We highlight parity-induced differences between the multipartite Bell-like functions used in order to quantify the degree of non-locality within a ring state and reveal a mechanism for the passive protection of multipartite quantum correlations against thermal spoiling effects that is clearly related to the macroscopic properties of the ring model.
@article{arxiv.1006.2265,
title = {Multipartite non-locality in a thermalized Ising spin-chain},
author = {Steve Campbell and Mauro Paternostro},
journal= {arXiv preprint arXiv:1006.2265},
year = {2015}
}