Multipartite nonlocality and symmetry breaking in one-dimensional quantum chains

Multipartite nonlocality is a measure of multipartite quantum correlations. In this paper we investigate the influence of symmetry-breaking perturbations upon ground-state nonlocality by considering several typical finite-size quantum models, including the transverse-field Ising chains, the XY (XX) chains, and the XXZ chains. We find that even a slight perturbation can reshape the nonlocality curve dramatically. For instance, in the XY chains, a perturbation can induce an oscillation behavior in the nonlocality curve. A clear microscopic mechanism for the results is proposed. Furthermore, we also connect the behaviors to the macroscopic symmetry properties of the chains and make some predictions on general models.