Neutron interferometer crystallographic imperfections and gravitationally induced quantum interference measurements

Heacock, B.; Arif, M.; Haun, R.; Huber, M. G.; Pushin, D. A.; Young, A. R.

doi:10.1103/physreva.95.013840

Title: Neutron interferometer crystallographic imperfections and gravitationally induced quantum interference measurements

Journal Article · 24 January 2017 · Physical Review A

DOI: https://doi.org/10.1103/physreva.95.013840 · OSTI ID:1535724

Heacock, B. ^[1]; Arif, M. ^[2]; Haun, R. ^[3]; Huber, M. G. ^[2]; Pushin, D. A. ^[4]; Young, A. R. ^[5]

North Carolina State Univ., Raleigh, NC (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory; DOE/OSTI
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Tulane Univ., New Orleans, LA (United States)
Univ. of Waterloo, ON (Canada). Inst. for Quantum Computing; Univ. of Waterloo, ON (Canada)
North Carolina State Univ., Raleigh, NC (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory

Dynamical diffraction leads to an interesting, unavoidable set of interference effects for neutron interferometers. This experiment studies the interference signal from two and three successive Bragg diffractions in the Laue geometry. We find that intrinsic Bragg-plane misalignment in monolithic, “perfect” silicon neutron interferometers is relevant between successive diffracting crystals, as well as within the Borrmann fan for typical interferometer geometries. Furthermore, we show that the dynamical phase correction employed in the Colella, Overhauser, and Werner gravitationally induced quantum interference experiments is attenuated by slight, intrinsic misalignments between diffracting crystals, potentially explaining the long-standing 1% discrepancy between theory and experiment. This systematic may also impact precision measurements of the silicon structure factor, affecting previous and future measurements of the Debye-Waller factor and neutron-electron scattering length as well as potential fifth-force searches. For the interferometers used in this experiment, Bragg planes of different diffracting crystals were found to be misaligned by 10 to 40 nrad.

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Research Organization:: North Carolina State Univ., Raleigh, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC)

Grant/Contract Number:: FG02-97ER41042

OSTI ID:: 1535724

Alternate ID(s):: OSTI ID: 1341262

Journal Information:: Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 95; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (4)

Increased interference fringe visibility from the post fabrication heat treatment of a perfect crystal silicon neutron interferometer Heacock, Benjamin; Arif, Muhammad; Cory, David G. arXiv https://doi.org/10.48550/arxiv.1710.06429	text	January 2017
Three Phase-Grating Moire Neutron Interferometer for Large Interferometer Area Applications Sarenac, D.; Pushin, D. A.; Huber, M. G. arXiv https://doi.org/10.48550/arxiv.1708.05421	text	January 2017
Increased interference fringe visibility from the post-fabrication heat treatment of a perfect crystal silicon neutron interferometer Heacock, B.; Arif, M.; Cory, D. G. Review of Scientific Instruments, Vol. 89, Issue 2 https://doi.org/10.1063/1.5008273	journal	February 2018
Three Phase-Grating Moiré Neutron Interferometer for Large Interferometer Area Applications Sarenac, D.; Pushin, D. A.; Huber, M. G. Physical Review Letters, Vol. 120, Issue 11 https://doi.org/10.1103/physrevlett.120.113201	journal	March 2018

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GENERAL PHYSICS
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neutron diffraction
precision measurements

Title: Neutron interferometer crystallographic imperfections and gravitationally induced quantum interference measurements

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