Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Quantum correlations in a noisy neutron interferometer

Published

Author(s)

Michael G. Huber, Muhammad D. Arif, Christopher Wood, D G. Cory, M. O. Abutaleb, Dimitry A. Pushin

Abstract

We investigate quantum coherences in the presence of noise by entangling the spin and path degrees of freedom of the output neutron beam from a noisy three-blade perfect crystal neutron interferometer. We nd that in the presence of dephasing noise on the path system the entanglement of the output state reduces to zero, however the quantum discord remains non-zero for all noise values. Hence even in the presence of strong noise non-classical correlations persist between spin and path of the neutron beam. This indicates that measurements performed on the spin of the neutron beam will induce a disturbance on the path state. We experimentally demonstrate this disturbance by comparing the contrasts of the output beam with and without spin measurements of three neutron interferometers with varying noise strengths. This demonstrates that even in the presence of noise that suppresses all entanglement, a neutron interferometer still exhibits uniquely quantum behaviour.
Citation
Physical Review Letters
Volume
90

Keywords

neutron interferometry, quantum coherence

Citation

Huber, M. , Arif, M. , Wood, C. , Cory, D. , Abutaleb, M. and Pushin, D. (2014), Quantum correlations in a noisy neutron interferometer, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevA.90.032315 (Accessed June 17, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created September 15, 2014, Updated November 10, 2018