Title
Beyond Bell's theorem: Realism and locality without Bell-type correlations
Date Issued
01 December 2017
Access level
open access
Resource Type
journal article
Publisher(s)
Nature Publishing Group
Abstract
The long-lasting view of entanglement as the characteristic trait of quantum mechanics has been recently challenged by experimental demonstrations of non-quantum entanglement. This motivates a review of the meaning of Bell violations, which have been widely taken to prove the impossibility of a realistic interpretation of quantum mechanics and as a manifestation of its non-local character. This work provides new theoretical evidence for the need of reviewing the meaning of Bell violations, especially when they occur outside the quantum framework. We present a local-realistic model that reproduces quantum predictions concerning Bell tests. We claim that local-realism is fully compatible with correlations that are not of the Bell type and therefore lie outside the scope of Bell's theorem. Most experimental Bell tests involve either spin vectors spanning the Bloch sphere or Stokes vectors spanning the Poincaré sphere. A suitable statistical tool that allows assessing correlations between vectors is given by inner-product-type correlations. Using them, it is possible to reproduce quantum predictions for all Bell states, thereby explaining experimental results of Bell tests within a local-realistic framework.
Volume
7
Issue
1
Language
English
OCDE Knowledge area
Física atómica, molecular y química
Scopus EID
2-s2.0-85032882824
PubMed ID
Source
Scientific Reports
ISSN of the container
20452322
Sponsor(s)
This work was partially financed by DGI-PUCP under Grant 2017-3-0015 ID-441. The author also acknowledges funding received from PUCP for covering the costs to publish in open access.
Sources of information: Directorio de Producción Científica Scopus