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 Tools annual

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 Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We demonstrate a technique for continuous tuning of the Hanle effect fromelectromagnetically induced transparency (EIT) to electromagnetically inducedabsorption (EIA) by changing the polarization ellipticity of a control beam. Incontrast to previous work in this field, we use spatially separated probe andcontrol beams. The experiments are done using magnetic sublevels of the $ F_g =4 \rightarrow F_e = 5 $ closed hyperfine transition in the 852 nm D$_2$ line of$^{133}$Cs. The atoms are contained in a room temperature vapor cell withanti-relaxation (paraffin) coating on the walls. The paraffin coating isnecessary for the atomic coherence to be transported between the beams. Theexperimental results are supported by a density-matrix analysis of the system,which also explains the observed amplitude and zero-crossing of the resonances.Such continuous tuning of the sign of a resonance has important applications inquantum memory and other precision measurements.

Tuning of the Hanle effect from EIT to EIA using spatially separated probe and control beams