Prospects for Studies of the Free Fall and Gravitational Quantum States of Antimatter
Joint Authors
Voronin, A. Y.
Crivelli, P.
Dufour, G.
Cassidy, D. B.
Debu, P.
Lambrecht, A.
Reynaud, S.
Wall, T. E.
Nesvizhevsky, Valery V.
Source
Advances in High Energy Physics
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-03-08
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Different experiments are ongoing to measure the effect of gravity on cold neutral antimatter atoms such as positronium, muonium, and antihydrogen.
Among those, the project GBAR at CERN aims to measure precisely the gravitational fall of ultracold antihydrogen atoms.
In the ultracold regime, the interaction of antihydrogen atoms with a surface is governed by the phenomenon of quantum reflection which results in bouncing of antihydrogen atoms on matter surfaces.
This allows the application of a filtering scheme to increase the precision of the free fall measurement.
In the ultimate limit of smallest vertical velocities, antihydrogen atoms are settled in gravitational quantum states in close analogy to ultracold neutrons (UCNs).
Positronium is another neutral system involving antimatter for which free fall under gravity is currently being investigated at UCL.
Building on the experimental techniques under development for the free fall measurement, gravitational quantum states could also be observed in positronium.
In this contribution, we report on the status of the ongoing experiments and discuss the prospects of observing gravitational quantum states of antimatter and their implications.
American Psychological Association (APA)
Dufour, G.& Cassidy, D. B.& Crivelli, P.& Debu, P.& Lambrecht, A.& Nesvizhevsky, Valery V.…[et al.]. 2015. Prospects for Studies of the Free Fall and Gravitational Quantum States of Antimatter. Advances in High Energy Physics،Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1052502
Modern Language Association (MLA)
Dufour, G.…[et al.]. Prospects for Studies of the Free Fall and Gravitational Quantum States of Antimatter. Advances in High Energy Physics No. 2015 (2015), pp.1-16.
https://search.emarefa.net/detail/BIM-1052502
American Medical Association (AMA)
Dufour, G.& Cassidy, D. B.& Crivelli, P.& Debu, P.& Lambrecht, A.& Nesvizhevsky, Valery V.…[et al.]. Prospects for Studies of the Free Fall and Gravitational Quantum States of Antimatter. Advances in High Energy Physics. 2015. Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1052502
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1052502