English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report the investigation of the influence of atomic motion on thefluorescence dynamics of dilute atomic ensemble driven by resonant pulseradiation. We show that even for sub-Doppler temperatures, the motion of atomscan significantly affect the nature of both superradiation and subradiation. Wealso demonstrate that, in the case of an ensemble of moving scatterers, it ispossible to observe the nonmonotonic time dependence of the fluorescence rate.This leads to the fact that, in certain time intervals, increasing intemperature causes not an decrease but increase of the fluorescence intensityin the cone of coherent scattering. We have analyzed the role of the frequencydiffusion of secondary radiation as a result of multiple light scattering in anoptically dense medium. It is shown that spectrum broadening is the main factorwhich determines radiation trapping upon resonant excitation. At later time,after the trapping stage, the dynamics is dominated by close pairs of atoms(dimers). The dynamics of the excited states of these dimers has been studiedin detail. It is shown that the change in the lifetime of the given adiabaticterm of the diatomic quasi-molecule induced by the change in the interatomicdistance as well as possible non-adiabatic transitions between sub- andsuperradiant states caused by atomic motion can lead not to the anticipatedweakening of subradiation effect but to its enhancement.

Motional effects in dynamics of fluorescence of cold atomic ensembles excited by resonance pulse radiation