Journal Article

Minimal Assumption Derivation of a Bell-type Inequality

Gerd Graßhoff, Samuel Portmann and Adrian Wüthrich

in The British Journal for the Philosophy of Science

Published on behalf of British Society for the Philosophy of Science

Volume 56, issue 4, pages 663-680
Published in print December 2005 | ISSN: 0007-0882
Published online October 2005 | e-ISSN: 1464-3537 | DOI: http://dx.doi.org/10.1093/bjps/axi140
Minimal Assumption Derivation of a Bell-type Inequality

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John Bell showed that a big class of local hidden-variable models stands in conflict with quantum mechanics and experiment. Recently, there were suggestions that empirically adequate hidden-variable models might exist which presuppose a weaker notion of local causality. We will show that a Bell-type inequality can be derived also from these weaker assumptions.

Introduction

The EPR-Bohm experiment

Local causality

Bell's inequality from separate common causes

4.1 A weak screening-off principle

4.2 Perfect correlation and ‘determinism’

4.3 A minimal theory for spins

4.4 No conspiracy

Discussion

Journal Article.  7026 words.  Illustrated.

Subjects: Philosophy of Science ; Science and Mathematics

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