Multipartite non-locality in a thermalized Ising spin-chain

TL;DR

This paper investigates multipartite quantum correlations and non-locality in a thermalized Ising spin chain, revealing mechanisms for protecting quantum correlations against thermal effects related to the system's macroscopic properties.

Contribution

It introduces a parity-based analysis of multipartite non-locality in an Ising ring and uncovers a passive protection mechanism for quantum correlations at finite temperatures.

Findings

Parity influences multipartite Bell-like functions.

Quantum correlations can be passively protected against thermal effects.

Macroscopic properties relate to non-locality preservation.

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.