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

The transversely confined propagating modes of an optical fiber mediatevirtually infinite range energy exchanges among atoms placed within theirfield, which adds to the inherent free space dipole-dipole coupling. Typically,the single atom free space decay rate largely surpasses the emission rate intothe guided fiber modes. However, scaling up the atom number as well as thesystem size amounts to entering a collective emission regime, wherefiber-induced superradiant spontaneous emission dominates over free spacedecay. We numerically study this super- and subradiant decay of highly excitedatomic states for one or several transverse fiber modes as present in hollowcore fibers. As particular excitation scenarios we compare the decay of atotally inverted state to the case of Pi/2 pulses applied transversely or alongthe fiber axis as in standard Ramsey or Rabi interferometry. While a mean fieldapproach fails to correctly describe the initiation of superradiance, asecond-order approximation accounting for pairwise atom-atom quantumcorrelations generally proves sufficient to reliably describe superradiance ofensembles from two to a few hundred particles. In contrast, a full account ofsubradiance requires the inclusion of all higher order quantum correlations.Considering multiple guided modes introduces a natural effective cut-off forthe interaction range emerging from the dephasing of different fibercontributions.

Super- and subradiance of clock atoms in multimode optical waveguides