# Macroscopic Locality

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## Abstract

The principle of macroscopic locality states that two parties performing coarse-grained extensive measurements over independent correlated pairs of physical systems can always interpret their observations with a classical theory. In this chapter, we briefly review this principle and generalize it to multipartite scenarios where each party is allowed to perform sequential measurements. We prove that this extended axiom is also satisfied by quantum theory and characterize the maximal set of correlations compatible with it. Finally, we observe how bipartite and tripartite correlations limited by macroscopic locality alone differ from the quantum set.

## Keywords

Quantum Correlation Classical Physic Bell Inequality Information Causality Positive Semidefinite Matrix
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