Related papers: Manipulation of gravitational quantum states of a bouncing neutron with the GRANIT spectrometer

Manipulation of gravitational quantum states of a bouncing neutron with the GRANIT spectrometer

URL: http://arxiv.org/abs/2205.11130v1
Date: Mon, 23 May 2022 08:37:28 GMT
Title: Manipulation of gravitational quantum states of a bouncing neutron with the GRANIT spectrometer
Authors: Benoit Cl\'ement, Stefan Bae{\ss}ler, Valery V. Nesvizhevsky, Emily Perry, Guillaume Pignol, Jason A. Pioquinto, Konstantin V. Protasov, Dominique Rebreyend, Damien Roulier, Lingnan Shen, Alexander V. Strelkov, Francis Vezzu
Abstract summary: The GRANIT apparatus is the first physics experiment connected to a superthermal helium UCN source. We report on the methods developed for this instrument showing how specific GQS can be favored using a step between mirrors and an absorbing slit.
Score: 44.62475518267084
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The bouncing neutron is one of the rare system where gravity can be studied in a quantum framework. To this end it is crucial to be able to select some specific gravitational quantum state (GQS). The GRANIT apparatus is the first physics experiment connected to a superthermal helium UCN source. We report on the methods developed for this instrument showing how specific GQS can be favored using a step between mirrors and an absorbing slit. We explore the increase of GQS separation efficiency by increasing the absorber roughness amplitude, and find it is feasible but requires a high adjustment precision. We also quantify the transmission of the absorbing slit leading to a measurement of the spatial extension of the neutron vertical wave function $z_0 = \hbar^{2/3}\left(2m^2g\right)^{-1/3} = 5.9\pm0.3\,\mu$m.

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