We investigate the effects of acceleration on the energy-level shifts of a hydrogen atom interacting with theelectromagnetic field and in the presence of an infinite perfectly conducting plate. We consider the contributionsof vacuum fluctuations and of the radiation reaction field to the Lamb shift, and we discuss theirdependence from the acceleration of the atom. We show that, because of the presence of the boundary, bothvacuum field fluctuations and radiation reaction field contributions are affected by atomic acceleration. Inparticular, the effect of the vacuum field fluctuations on the energy-level shifts is not equivalent to that of athermal field. We also discuss the dependence of the Lamb shift from the orientations of the atomic dipole. Weshow that, for specific orientations of the atomic dipole, the atomic level shifts contain an extra contribution,as compared with the case of an atom at rest, suggesting the possibility to detect the effects of the accelerationfor atoms with anisotropic polarizability.
|Numero di pagine||9|
|Rivista||PHYSICAL REVIEW A|
|Stato di pubblicazione||Published - 2009|
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