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arXiv · 2502.18936

Measurement of Neutron Whispering Gallery States Using a Pulsed Neutron Beam

Go Ichikawa·Kenji Mishima
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Abstract

A neutron whispering gallery state is a quantum state localized on a material surface bound by the centrifugal force and the material potential. Precise measurements of such quantum states enable tests of quantum mechanics in non-inertial frames, characterization of the surface potential, and searches for hypothetical short-range interactions at the nanometer scale. We observed a neutron whispering gallery state on a $\mathrm{SiO}_2$ concave mirror using a pulsed cold neutron beam. The measured results agree with theoretical calculations within $1.9\%$ for the centrifugal acceleration $a \approx 7\times 10^7\,\mathrm{m/s^2}$, which is due to unmodeled deviations of the shape of the concave mirror edge from an ideal one. We found that the sensitivity itself was $1\times 10^{-4}$, which is two orders of magnitude better than the above agreement.

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Go Ichikawa, Kenji Mishima. 2025-02-26. Measurement of Neutron Whispering Gallery States Using a Pulsed Neutron Beam. https://doi.org/10.1103/physrevd.111.082008

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