https://doi.org/10.1140/epjd/s10053-026-01139-6
Research - Photon
Simultaneous multiphoton–multiatom processes in atomic gases under laser fields
Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, West No. 30 Xiao Hong Shan, 430071, Wuchang, Wuhan, China
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Received:
22
October
2025
Accepted:
25
February
2026
Published online:
26
March
2026
Abstract
We investigate simultaneous multiphoton–multiatom processes in atomic gases exposed to laser fields. Under specific frequency conditions, multiple atoms undergo simultaneous excitation via the absorption of one-laser photon each. We clarify that these higher-order quantum electrodynamics (QED) effects occur naturally and do not require mediation through interatomic interactions—a conclusion strongly supported by previous experimental observations. Furthermore, we identify a characteristic length scale that governs the physical range of these phenomena. This scale emerges from the uncertainty principle and is consistent with existing experimental data. Finally, we propose a new experimental scheme to advance the investigation of these intriguing processes.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
