Construct a physically motivated strongly local contextual Bell model violating BCHSH

Construct a physically motivated strongly local contextual Bell model based on local physical dynamics that violates the BCHSH inequality for suitable detector settings, extending the purely mathematical Popescu–Rohrlich-based example.

Background

The paper constructs a discrete contextual Bell model that is strongly local according to the paper’s definition yet achieves the maximal algebraic violation of the BCHSH inequality. However, that construction is introduced as a mathematical proof of concept and does not explain how the setting-dependent probabilities arise physically.

The unresolved task is to derive such a model from physical dynamics—preferably classical or quantum relativistic dynamics—while retaining strong locality and producing a BCHSH violation for appropriate settings. The conclusion identifies a classical special-relativistic model, potentially involving electromagnetism and stochastically dependent initial particle data, as a possible route.

References

Accordingly, a physically motivated example of a strongly local contextual Bell model that is based on ``locally mediated interactions'' and that also violates the BCHSH inequality remains to be found.

— On the applicability of Kolmogorov's theory of probability to the description of quantum phenomena. Part II: Bell inequalities  (2609.31075 - Reddiger, 25 Sep 2026) in Section 4, immediately after the Popescu–Rohrlich construction in Section 4.1; reiterated in Section 7, Conclusion and outlook