A1 Refereed original research article in a scientific journal
Quantum reflection of antihydrogen from a liquid helium film
Authors: Crepin PP, Kupriyanova EA, Guerout R, Lambrecht A, Nesvizhevsky VV, Reynaud S, Vasiliev S, Voronin AY
Publisher: EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
Publication year: 2017
Journal: EPL
Journal name in source: EPL
Journal acronym: EPL-EUROPHYS LETT
Article number: ARTN 33001
Volume: 119
Issue: 3
Number of pages: 6
ISSN: 0295-5075
DOI: https://doi.org/10.1209/0295-5075/119/33001
Abstract
We study the quantum reflection of ultracold antihydrogen atoms bouncing on the surface of a liquid helium film. The Casimir-Polder potential and quantum reflection are calculated for different thicknesses of the film supported by different substrates. Antihydrogen can be protected from annihilation for as long as 1.3 s on a bulk of liquid He-4, and 1.7 s for liquid He-3. These large lifetimes open interesting perspectives for spectroscopic measurements of the free fall acceleration of antihydrogen. Variation of the scattering length with the thickness of a film of helium shows interferences which we interpret through a Liouville transformation of the quantum reflection problem. Copyright (C) EPLA, 2017
We study the quantum reflection of ultracold antihydrogen atoms bouncing on the surface of a liquid helium film. The Casimir-Polder potential and quantum reflection are calculated for different thicknesses of the film supported by different substrates. Antihydrogen can be protected from annihilation for as long as 1.3 s on a bulk of liquid He-4, and 1.7 s for liquid He-3. These large lifetimes open interesting perspectives for spectroscopic measurements of the free fall acceleration of antihydrogen. Variation of the scattering length with the thickness of a film of helium shows interferences which we interpret through a Liouville transformation of the quantum reflection problem. Copyright (C) EPLA, 2017
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