Quantum Contextuality Measurements on Mode-Entangled Neutron Beams

We present and discuss recent measurements [1,2,3] of quantum contextuality witness values for neutron beams mode-entangled in spin, position, and energy degrees of freedom. These measurements explicitly confirm the ability of entangled slow neutron beams to evade quantum decoherence in condensed matter and may help enable precision measurements with neutron beams to avoid certain classes of systematic errors.

[1] J. Shen et al, Nature Comm. 11, 930 (2020).

[2] S. Lu et al, Phys. Rev. A 101, 042318 (2020).

[3] S. J. Kuhn et al, Phys. Rev. Res. 3, 023227 (2021).

*This work is supported by DOE BES grant DE-AC05-00OR22725, DOE STTR grant DE-SC0009584, the Indiana U Emerging Areas of Research program, Austrian Science Fund (FWF) grants P30677 and P34239, NSF grant PHY-1913789, US Department of Commerce Cooperative Agreement 70NANB15H259, the ORNL LDRD program, beamtime allocation award RB1920268 at the ISIS Neutron and Muon Source, and beamtime allocation at the HFIR reactor, a US Department of Energy Office of Science User Facility operated by ORNL.

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Bulletin of the American Physical Society

2021 Fall Meeting of the APS Division of Nuclear Physics

Volume 66, Number 8

Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time

Session QJ: Neutron Physics

Abstract: QJ.00001 : Quantum Contextuality Measurements on Mode-Entangled Neutron Beams*

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