Multipartite non-locality in a thermalized Ising spin-chain

Abstract

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.

8 pages, 6 figures, RevTeX4, Published version

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• Multi-partite entanglement and quantum phase transition in the one-, two-, and three-dimensional transverse field Ising model
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• Experimental linear-optics simulation of the ground state of an interacting quantum spin-ring
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• Study of quantum non-locality by CHSH function and its extension in disordered fermions
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• Bell Non-Locality in Many Body Quantum Systems with Exponential Decay of Correlations