Noise and Bell's inequality

TL;DR

This paper demonstrates that classical optical polarization experiments incorporating noise can violate Bell's inequality, challenging the notion that such violations are exclusive to quantum systems.

Contribution

It reveals that classical systems with noise can violate Bell's inequality, questioning the quantum-exclusive interpretation of such violations.

Findings

Classical optical experiments with noise can violate Bell's inequality.

Noise in classical systems can mimic quantum correlations.

Challenges the assumption that Bell violation implies quantum behavior.

Abstract

From the beginning of quantum mechanics, there has been a discussion about the concept of reality, as exemplified by the EPR paradox. To many, the idea of the paradox and the possibility of local hidden variables was dismissed by the Bell inequality. Yet, there remains considerable evidence that this inequality can be violated even by classical systems, so that experiments showing quantum behavior and the violation of the inequality must be questioned. Here, we demonstrate that classical optical polarization experiments based upon noise in the system can be shown to violate the Bell inequality.