# Electromagnetically induced transparency in cold 85Rb atoms trapped in the ground hyperfine F = 2 state

## TL;DR

This paper demonstrates electromagnetically induced transparency (EIT) in cold 85Rb atoms trapped in the F=2 hyperfine ground state, analyzing two $$-level systems and the effects of magnetic sublevels and Rabi frequency.

## Contribution

It provides experimental observation and theoretical analysis of EIT in cold 85Rb atoms specifically in the F=2 hyperfine ground state, exploring different hyperfine transitions.

## Key findings

- EIT observed in cold 85Rb atoms in F=2 state
- Effects of magnetic sublevels on EIT signals analyzed
- Influence of Rabi frequency on EIT signal strength studied

## Abstract

We report electromagnetically induced transparency (EIT) in cold 85Rb atoms, trapped in the lower hyperfine level F = 2, of the ground state 5$^{2}S_{1/2}$ (Tiwari V B \textit{et al} 2008 {\it Phys. Rev.} A {\bf 78} 063421). Two steady state $\Lambda$-type systems of hyperfine energy levels are investigated using probe transitions into the levels F$^{\prime}$ = 2 and F$^{\prime}$ = 3 of the excited state 5$^{2}P_{3/2}$ in the presence of coupling transitions F = 3 $\to$ F$^{\prime}$ = 2 and F = 3 $\to$ F$^{\prime}$ = 3, respectively. The effects of uncoupled magnetic sublevel transitions and coupling field's Rabi frequency on the EIT signal from these systems are studied using a simple theoretical model.