https://doi.org/10.1140/epjc/s10052-021-09970-4
Regular Article - Theoretical Physics
Motion-induced energy shifts of a multilevel atom in a black-body radiation field
1
Department of Physics, Anhui Normal University, 241002, Wuhu, Anhui, China
2
Department of Physics, Zhejiang University, 310027, Hangzhou, Zhejiang, China
Received:
18
November
2021
Accepted:
23
December
2021
Published online:
13
January
2022
We investigate the influence of atomic uniform motion on radiative energy shifts of a multilevel atom when it interacts with black-body radiation. Our analysis reveals that the atomic energy shifts depend crucially on three factors: the temperature of black-body thermal radiation, atomic velocity, and atomic polarizability. In the low-temperature limit, the presence of atomic uniform motion always enhances the effect of the thermal field on the atomic energy shifts. However, in the high-temperature limit, the atomic uniform motion enhances the effect of the thermal field for an atom polarizable perpendicular to the atomic velocity but weakens it for an atom polarizable parallel to the atomic velocity. Our work indicates that the physical properties of atom–field coupling systems can in principle be regulated and controlled by the combined action of the thermal field and the atomic uniform motion.
© The Author(s) 2022
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