On the violation of the CHSH network model inequality

TL;DR

This paper shows that quantum correlations can be approximated by local hidden variables models and that the CHSH inequality can be violated within this framework, challenging assumptions about locality in quantum mechanics.

Contribution

It introduces a local hidden variables model capable of approximating quantum correlations and violating the CHSH inequality, questioning the exclusivity of quantum nonlocality.

Findings

Quantum correlations can be approximated by local hidden variables models.

The CHSH inequality can be violated within this local model.

Experimental searches for local hidden causality remain meaningful.

Abstract

In the present paper it is demonstrated that the quantum correlation (2-dim unitary parameter vectors) can be arbitrarily close approximated with a local hidden variables model. Moreover, the CHSH inequality can be violated with the present model. This does not conclusively demonstrate that locality and causality can be restored to quantum mechanics. However, it does show that an experimental search for local hidden causality need not be fruitless beforehand.