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On Bell's Experiment

Han J.F. Geurdes

Published Nov 1, 2018• 0 citations
OpenAlex

Abstract

With the use of tropical algebra operators and a d=2 parameter vectors space, Bell's theorem does not forbid a, physics vvalid, reproduction of the quantum correlation.

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Mengyao Hu, Eloïc Vallée, Tim Seynnaeve +3 more

Nonlocality is one of the key features of quantum physics, which is revealed through the violation of a Bell inequality. In large multipartite systems, nonlocality characterization quickly becomes a challenging task. A common practice is to make use of symmetries, low-order correlators, or exploiting local geometries, to restrict the class of inequalities. In this paper, we characterize translation-invariant (TI) Bell inequalities with finite-range correlators in one-dimensional geometries. We introduce a novel methodology based on tropical algebra tensor networks and highlight its connection to graph theory. Surprisingly, we find that the TI Bell polytope has a number of extremal points that can be uniformly upper-bounded with respect to the system size. We give an efficient method to list all vertices of the polytope for a particular system size, and characterize the tightness of a given TI Bell inequality. The connections highlighted in our work allow us to re-interpret concepts developed in the fields of tropical algebra and graph theory in the context of Bell nonlocality, and vice-versa. This work extends a parallel article [M. Hu \textit{et al.}, arXiv: 2208.02798 (2022)] on the same subject.

arXiv:2407.08783•Physical Review A•Jan 13, 2026•1 citation
Bell’s theorem is widely understood as demonstrating that quantum correlations cannot be explained by any theory of local hidden variables. The experimental violation of Bell inequalities has therefore often been interpreted as evidence for nonlocality or “spooky action at a distance.” This paper proposes a different geometric interpretation. It accepts Bell’s theorem as a decisive refutation of separable preassigned vector realism, but argues that entangled systems need not be modeled as pairs of particles carrying hidden local vector outcomes. Instead, the entangled state is interpreted as a nonseparable bivector coherence relation whose correlated vector outcomes are disclosed only through measurement. On this view, measurement is a basis-conditioned reduction from bivector structure to local vector registration. The standard singlet correlation E(a,b)=-a⋅b, including the Tsirelson bound S=2√2, is then interpreted as the scalar trace of a shared bivector relation rather than as the result of superluminal influence. The framework does not deny Bell’s theorem, Bell experiments, or quantum statistics. It instead reframes their ontological meaning: Bell violation marks the failure of separable vector completion, not the necessity of action at a distance. Keywords: Bell’s theorem; entanglement; bivectors; geometric algebra; spin; nonlocality; measurement; quantum foundations; Tsirelson bound; separable realism; relational ontology; UCCF. Explainer video Watch on YouTube (Roots of Reality): https://youtu.be/wfpY4QZ45ME The video, its thumbnail and description are included in this record.
Nonlocality is one of the key features of quantum physics, which is revealed through the violation of a Bell inequality. In large multipartite systems, nonlocality characterization quickly becomes a challenging task. A common practice is to make use of symmetries, low-order correlators, or exploiting local geometries, to restrict the class of inequalities. In this paper, we characterize translation-invariant (TI) Bell inequalities with finite-range correlators in one-dimensional geometries. We introduce a novel methodology based on tropical algebra tensor networks and highlight its connection to graph theory. Surprisingly, we find that the TI Bell polytope has a number of extremal points that can be uniformly upper-bounded with respect to the system size. We give an efficient method to list all vertices of the polytope for a particular system size, and characterize the tightness of a given TI Bell inequality. The connections highlighted in our work allow us to re-interpret concepts developed in the fields of tropical algebra and graph theory in the context of Bell nonlocality, and vice-versa. This work extends a parallel article [M. Hu \textit{et al.}, arXiv: 2208.02798 (2022)] on the same subject.