Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1304.4512 · Physical Review A

Quantum contextuality in a Young-type interference experiment

G. F. Borges, Marcos Carvalho, Pierre-Louis de Assis, José Ferraz, Mateus Araújo, Adán Cabello, Marcelo Terra Cunha, Sebastião Pádua

Published May 8, 2014• 28 citations
arXivHTMLPDF

Abstract

We show that correlations between the detector positions at the two-photon Young interference plane exhibit contextual behavior. Contextuality is demonstrated by showing the violation of the $n$-cycle noncontextuality inequalities [M. Ara\'ujo et al., Phys. Rev. A 88, 022118 (2013)] for any even number $n$ of observables ranging from 4 to 14. These violations exclude noncontextual hidden-variable theories as an explanation of the conditional two-photon Young pattern. Unlike recent contextuality experiments, ours is free of the compatibility loophole.

DOI
10.1103/physreva.89.052106

Related papers

Experimental demonstration of quantum contextuality with nine observables on a single photonic qutrit

Xiao-Xiao Chen, Jian Li, Mairikena Aili +3 more

The violation of contextuality inequalities shows a strong conflict between the noncontextual hidden variable theory and quantum mechanics. A single qutrit is the simplest indivisible quantum system that can allow a state-dependent contextuality test with five observables and a state-independent contextuality test with 13 observables. For any qutrit states, except for the maximally mixed state, one can always find a set of nine observables for which the corresponding inequality is violated [P. Kurzynski and D. Kaszlikowski, Phys. Rev. A 86, 042125 (2012)]. In this paper, we demonstrate the violation of this inequality using single-photon experiments. Our experiments not only enrich the tests of quantum contextuality, but also deepen the understanding of the physical nature of quantum mechanics.

Physical Review A•Apr 25, 2023•2 citations

A contextualidade da interferência condicional de dois fótons: um estudo em múltiplos cenários

Gilberto Ferreira Borges Júnior

In this work we test a family of noncontextuality inequalities developed from a unied view of several non-contextual scenarios, ie, a construction that allows unify seemingly disparate Gedankenexperiments used for quantum contextuality proofs, among which is the experiment that allows testing the CHSH inequality. Each of these inequalities predicts numerical limitations on the correlations of a physical system, when they are modeled by noncontextual theories. Violation of these inequalities shows that for a given scenario the correlations in the system can not be explained from a noncontextual viewpoint . The system which we want to test the contextual nature is two photonic qbits in the transversal path variable of twin photons generated by Spontaneous Parametric Down Conversion (SPDC). After being generated, the photon pairs cross a double-slit and exit it in a entangled state in path variables. Violation of the non-contextual inequalities for different measurement scenariosdemonstrates that the nonlocal conditionality displayed in the Youngexperiment with photons generated by SPDC, can not be properly explained by a local deterministic model, i.e, can not be explained in scope of a non-contextual hidden variable theory.

•Jun 7, 2013•0 citations

Experimental demonstration of quantum contextuality with nonentangled photons

Bi‐Heng Liu, Yun‐Feng Huang, Yan-Xiao Gong +4 more

We present an experimental test of quantum contextuality by using two-photon product states. The experimental results show that the noncontextual hidden-variable theories are violated by nonentangled states in spite of the local hidden-variable theories can be violated or not. We find that the Hong-Ou-Mandel-type quantum interference effect causes the quantum contextuality.

Physical Review A•Oct 1, 2009•47 citations

Proposal of a Two-Qutrit Contextuality Test Free of the Finite Precision and Compatibility Loopholes

Adán Cabello, Marcelo Terra Cunha

It has been argued that any test of quantum contextuality is nullified by the fact that perfect orthogonality and perfect compatibility cannot be achieved in finite precision experiments. We introduce experimentally testable two-qutrit violations of inequalities for noncontextual theories in which compatibility is guaranteed by the fact that measurements are performed on separated qutrits. The inequalities are inspired by the basic building block of the Kochen-Specker proof of quantum contextuality for a qutrit, despite the fact that their proof is completely independent of it.

arXiv:1009.2330•Physical Review Letters•May 13, 2011•26 citations

Experimental test of state-independent quantum contextuality of an indivisible quantum system

Yun‐Feng Huang, Meng Li, Dong-Yang Cao +5 more

We report a state-independent experimental test of quantum contextuality of a single-photon qutrit. The experimental results demonstrate violations of an inequality originally formulated by Yu and Oh [Phys. Rev. Lett. 108, 030402 (2012)] and further optimized by Cabello et al. [Phys. Rev. A 85, 032108 (2012)]; this inequality is satisfied by all noncontextual hidden variable models and is violated by all qutrit states. Our experiment shows quantum contextuality of this nature in a most fundamental way: A way that is independent of state and unrelated to entanglement.

Physical Review A•May 24, 2013•25 citations

Experimentally Testable State-Independent Quantum Contextuality

Adán Cabello

We show that there are Bell-type inequalities for noncontextual theories that are violated by any quantum state. One of these inequalities between the correlations of compatible measurements is particularly suitable for testing this state-independent violation in an experiment.

arXiv:0808.2456•Physical Review Letters•Nov 19, 2008•407 citations
We show that correlations between the detector positions at the two-photon Young interference plane exhibit contextual behavior. Contextuality is demonstrated by showing the violation of the nnn-cycle noncontextuality inequalities [M. Ara'ujo et al., Phys. Rev. A 88, 022118 (2013)] for any even number nnn of observables ranging from 4 to 14. These violations exclude noncontextual hidden-variable theories as an explanation of the conditional two-photon Young pattern. Unlike recent contextuality experiments, ours is free of the compatibility loophole.
The violation of contextuality inequalities shows a strong conflict between the noncontextual hidden variable theory and quantum mechanics. A single qutrit is the simplest indivisible quantum system that can allow a state-dependent contextuality test with five observables and a state-independent contextuality test with 13 observables. For any qutrit states, except for the maximally mixed state, one can always find a set of nine observables for which the corresponding inequality is violated [P. Kurzynski and D. Kaszlikowski, Phys. Rev. A 86, 042125 (2012)]. In this paper, we demonstrate the violation of this inequality using single-photon experiments. Our experiments not only enrich the tests of quantum contextuality, but also deepen the understanding of the physical nature of quantum mechanics.
In this work we test a family of noncontextuality inequalities developed from a unied view of several non-contextual scenarios, ie, a construction that allows unify seemingly disparate Gedankenexperiments used for quantum contextuality proofs, among which is the experiment that allows testing the CHSH inequality. Each of these inequalities predicts numerical limitations on the correlations of a physical system, when they are modeled by noncontextual theories. Violation of these inequalities shows that for a given scenario the correlations in the system can not be explained from a noncontextual viewpoint . The system which we want to test the contextual nature is two photonic qbits in the transversal path variable of twin photons generated by Spontaneous Parametric Down Conversion (SPDC). After being generated, the photon pairs cross a double-slit and exit it in a entangled state in path variables. Violation of the non-contextual inequalities for different measurement scenariosdemonstrates that the nonlocal conditionality displayed in the Youngexperiment with photons generated by SPDC, can not be properly explained by a local deterministic model, i.e, can not be explained in scope of a non-contextual hidden variable theory.
It has been argued that any test of quantum contextuality is nullified by the fact that perfect orthogonality and perfect compatibility cannot be achieved in finite precision experiments. We introduce experimentally testable two-qutrit violations of inequalities for noncontextual theories in which compatibility is guaranteed by the fact that measurements are performed on separated qutrits. The inequalities are inspired by the basic building block of the Kochen-Specker proof of quantum contextuality for a qutrit, despite the fact that their proof is completely independent of it.
We report a state-independent experimental test of quantum contextuality of a single-photon qutrit. The experimental results demonstrate violations of an inequality originally formulated by Yu and Oh [Phys. Rev. Lett. 108, 030402 (2012)] and further optimized by Cabello et al. [Phys. Rev. A 85, 032108 (2012)]; this inequality is satisfied by all noncontextual hidden variable models and is violated by all qutrit states. Our experiment shows quantum contextuality of this nature in a most fundamental way: A way that is independent of state and unrelated to entanglement.