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Related Experiment Video

Updated: Jun 8, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Proposal for revealing quantum nonlocality via local contextuality.

Adán Cabello¹

¹Departamento de Física Aplicada II, Universidad de Sevilla, E-41012 Sevilla, Spain. adan@us.es

Physical Review Letters

|September 28, 2010

Summary

Quantum nonlocality can exist between distant systems, even with local correlations. New tests reveal this nonlocality through contextuality, linking to the Kochen-Specker theorem and quantum contextuality.

Area of Science:

Quantum Information Science
Foundations of Quantum Mechanics

Background:

Quantum nonlocality describes correlations between distant systems that cannot be explained by local hidden variable theories.
Previous studies have focused on Bell inequalities to demonstrate nonlocality, but some correlations can still be explained by local models.

Purpose of the Study:

To investigate quantum nonlocality in systems where correlations admit a local model.
To explore the role of quantum contextuality in revealing nonlocality.
To enable an experimental test of the Kochen-Specker theorem with locality.

Main Methods:

Analyzing correlations between successive measurements on one of two distant systems.
Investigating whether these extra correlations admit a noncontextual model, irrespective of the system's reduced state.

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

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Last Updated: Jun 8, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Main Results:

Demonstrated that quantum nonlocality can be revealed in systems whose correlations admit a local model.
Showed that this nonlocality is linked to the failure of noncontextual models for successive measurements.
Established a connection between quantum contextuality and quantum nonlocality.

Conclusions:

Quantum contextuality is fundamental to quantum nonlocality.
The findings allow for experimental verification of the Kochen-Specker theorem in the context of locality.
This work deepens the understanding of the interplay between nonlocality and contextuality in quantum mechanics.