# A Local-Realistic Quantum Mechanical Model of Spin and Spin Entanglement

## TL;DR

This paper presents a local-realistic stochastic model that reproduces quantum spin and entanglement results, including Bell inequality violations, by exploiting the coincidence loophole, challenging traditional interpretations of quantum nonlocality.

## Contribution

It introduces a novel local and realist model capable of replicating quantum spin phenomena and Bell test results without relying on standard quantum formalism.

## Key findings

- Model reproduces QM spin and entanglement results
- Violates Bell--CHSH inequalities via the coincidence loophole
- Maintains locality and realism in the simulation

## Abstract

This paper aims at reproducing quantum mechanical (QM) spin and spin entanglement results using a realist, stochastic, and local approach, without the standard QM mathematical formulation. The concrete model proposed includes the description of Stern-Gerlach apparatuses and of Bell test experiments. Single particle trajectories are explicitly evaluated as a function of a few stochastic variables that they assumedly carry on. QM predictions re retrieved as probability distributions of similarly-prepared ensembles of particles. Notably, it is shown that the proposed model, despite being both local and realist, is able to violate the Bell--CHSH inequalities by exploiting the coincidence loophole and thus intrinsically renouncing to one of the Bell's assumptions.

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Source: https://tomesphere.com/paper/1901.00369