2025-11-18 スウォンジー大学
＜関連情報＞
- https://www.swansea.ac.uk/press-office/news-events/news/2025/11/swansea-physicists-drive-antihydrogen-breakthrough-at-cern-with-record-trapping-technique.php
- https://www.nature.com/articles/s41467-025-65085-4
Be+の支援により、15000個以上の反水素原子を同時に閉じ込める Be+ assisted, simultaneous confinement of more than 15000 antihydrogen atoms
R. Akbari,L. O. de Araujo Azevedo,C. J. Baker,W. Bertsche,N. M. Bhatt,G. Bonomi,A. Capra,I. Carli,C. L. Cesar,M. Charlton,A. Cridland Mathad,A. Del Vincio,D. Duque Quiceno,S. J. Eriksson,A. Evans,J. Ewins,J. Fajans,T. Friesen,M. C. Fujiwara,L. M. Golino,M. B. Gomes Gonçalves,J. S. Hangst,M. E. Hayden,D. Hodgkinson,… J. S. Wurtele
Nature Communications Published:18 November 2025
DOI:https://doi.org/10.1038/s41467-025-65085-4
Abstract
Antihydrogen, the bound state of a positron and an antiproton, is the only pure anti-atomic system ever studied. It is produced exclusively in the laboratory, as it has never been observed in nature. This unique system is of great interest for searching for tentative differences between matter and antimatter. Antihydrogen has been routinely trapped since 2010 and accumulated since 2017, enabling, for example, the first precision spectroscopic study of the anti-atom in 2018 and the first observation of the influence of gravity in 2023. Here we report an eight-fold increase in the trapping rate of antihydrogen, enabled by sympathetic cooling of positrons with laser-cooled beryllium ions. With beryllium sympathetic cooling, we now accumulate over 15000 antihydrogen atoms in under seven hours. This technique transforms our ability to study systematic and sidereal effects in existing experiments while paving the way for studies that would otherwise remain out of reach.
