Manipulation of gravitational quantum states of a bouncing neutron with the GRANIT spectrometer
| Autor: | Clément, Benoit, Baeßler, Stefan, Nesvizhevsky, Valery V., Perry, Emily, Pignol, Guillaume, Pioquinto, Jason A., Protasov, Konstantin V., Rebreyend, Dominique, Roulier, Damien, Shen, Lingnan, Strelkov, Alexander V., Vezzu, Francis |
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| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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. Comment: 5 pages, 3 figures |
| Databáze: | arXiv |
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