A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Gravitational and matter-wave spectroscopy of atomic hydrogen at ultra-low energies
Tekijät: Sergey Vasiliev, Janne Ahokas, Jarno Järvinen, Valery Nesvizhevsky, Alexei Voronin, François Nez, Serge Reynaud
Kustantaja: SPRINGER INTERNATIONAL PUBLISHING AG
Julkaisuvuosi: 2019
Journal: Hyperfine Interactions
Tietokannassa oleva lehden nimi: HYPERFINE INTERACTIONS
Lehden akronyymi: HYPERFINE INTERACT
Artikkelin numero: ARTN 14
Numero sarjassa: 14
Vuosikerta: 240
Sivujen määrä: 10
ISSN: 0304-3843
eISSN: 1572-9540
DOI: https://doi.org/10.1007/s10751-018-1551-x
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/39607933
We propose experiments with atomic hydrogen gas at ultra-low temperatures T <100K when the thermal energy of atoms is comparable with the changes of their potential energy in the Earth gravity field. At these conditions we suggest implementing a gravitational spectroscopy for studies of quantum properties of ultra-cold atomic hydrogen and its interactions with matter and gravity, similar to experiments with ultra-cold neutrons (Nesvizhevsky et al. Nature 415, 297 2002). A magnetic trap used for reaching the Bose-Einstein Condensation (Fried et al. Phys. Rev. Lett. 81, 3811 1998) can be used for cooling a large number of H atoms below 1 mK. Evaporative cooling over the trap barrier allows effective cooling of the vertical degree of freedom of the trapped atoms. Releasing these ultra-slow atoms from the trap onto the cold surface of superfluid helium will allow studies of quantum bounces and stationary gravitational states of H atoms in the potential well created by this surface and the field of Earth gravity. Experimental study of properties of gravitational quantum states of hydrogen and quantum reflection of ultracold hydrogen from surface would be of major importance for designing similar experiments with antihydrogen, which are currently prepared in CERN.
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