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

Bulletin of the American Physical Society

One Step to Precision Measurement from Quantum Contextuality Test of Entangled Single Neutron

Jiazhou Shen, Stephen J. Kuhn, Eric Dees, Samuel McKay, Shufan Lu, Abu Ashik Irfan, David V. Baxter, Gerardo Ortíz, R. Pynn, Michael Snow

Published Nov 1, 2020• 0 citations
OpenAlex

Related papers

Quantum Contextuality Measurements on Mode-Entangled Neutron Beams

William Michael Snow, David V. Baxter, Eric Dees +14 more

Bulletin of the American Physical Society•Oct 14, 2021•0 citations

Quantum contextuality induced by spin-path entanglement in single-neutrons

Yuji Hasegawa, Rudolf Loidl, G. Badurek +3 more

Acta Physica Hungarica B) Quantum Electronics•Dec 2, 2009•0 citations

Violation of a Bell-like inequality in single-neutron interferometer experiments: quantum contextuality

Helmut Rauch, Yuji Hasegawa, Rudolf Loidl +2 more

Journal of Modern Optics•May 1, 2004•0 citations

Violation of Bell-type inequality in single-neutron interferometry: quantum contextuality

Yuji Hasegawa, Rudolf Loidl, G. Badurek +2 more

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment•Jun 3, 2004•8 citations

Recent studies of fundamental phenomena in quantum mechanics with single-neutrons

Yuji Hasegawa

Experimental investigations of quantum mechanical phenomena with neutron inter-ferometer and polarimeters are presented. Interferometry exhibits clear evidence of quantum-contextuality and polarimetry demonstrates conflicts of a contextual model of quantum mechanics á la Leggett. In these experiments, entanglements are achieved between degrees of freedom in a single-particle: spin, path and energy degrees of freedom are manipulated coherently and entangled. Both experiments manifest the fact that quantum contextuality is valid for phenomena with matter waves with high precision. In addition, another experiment is described which deals with error-disturbance uncertainty relation: we have experimentally tested error-disturbance uncertainty relations, one is derived by Heisenberg and the other by Ozawa. Experimental results confirm the fact that the Heisenberg's uncertainty relation is often violated and that the new relation by Ozawa is always larger than the limit.

AIP conference proceedings•Jan 1, 2012•0 citations

Violation of a Bell-like inequality in neutron optical experiments: quantum contextuality

Yuji Hasegawa, Rudolf Loidl, G. Badurek +2 more

We report a single-neutron optical experiment to demonstrate the violation of a Bell-like inequality. Entanglement is achieved not between particles, but between the degrees of freedom, in this case, for a single-particle. The spin-{\small 1/2} property of neutrons are utilized. The total wave function of the neutron is described in a tensor product Hilbert space. A Bell-like inequality is derived not by a non-locality but by a contextuality. Joint measurements of the spinor and the path properties lead to the violation of a Bell-like inequality. Manipulation of the wavefunction in one Hilbert space influences the result of the measurement in the other Hilbert space. A discussion is given on the quantum contextuality and an entanglement-induced correlation in our experiment.

arXiv:quant-ph/0311121•Journal of Optics B Quantum and Semiclassical Optics•Mar 1, 2004•9 citations
Experimental investigations of quantum mechanical phenomena with neutron inter-ferometer and polarimeters are presented. Interferometry exhibits clear evidence of quantum-contextuality and polarimetry demonstrates conflicts of a contextual model of quantum mechanics á la Leggett. In these experiments, entanglements are achieved between degrees of freedom in a single-particle: spin, path and energy degrees of freedom are manipulated coherently and entangled. Both experiments manifest the fact that quantum contextuality is valid for phenomena with matter waves with high precision. In addition, another experiment is described which deals with error-disturbance uncertainty relation: we have experimentally tested error-disturbance uncertainty relations, one is derived by Heisenberg and the other by Ozawa. Experimental results confirm the fact that the Heisenberg's uncertainty relation is often violated and that the new relation by Ozawa is always larger than the limit.
We report a single-neutron optical experiment to demonstrate the violation of a Bell-like inequality. Entanglement is achieved not between particles, but between the degrees of freedom, in this case, for a single-particle. The spin-{\small 1/2} property of neutrons are utilized. The total wave function of the neutron is described in a tensor product Hilbert space. A Bell-like inequality is derived not by a non-locality but by a contextuality. Joint measurements of the spinor and the path properties lead to the violation of a Bell-like inequality. Manipulation of the wavefunction in one Hilbert space influences the result of the measurement in the other Hilbert space. A discussion is given on the quantum contextuality and an entanglement-induced correlation in our experiment.