Stimulated Raman transitions via multiple atomic levels

TL;DR

This paper provides a comprehensive analysis of stimulated Raman transitions involving multiple atomic levels, highlighting the natural emergence of lightshift and its implications for alkali-metal atoms like cesium.

Contribution

It introduces a concise multilevel, off-resonant framework for stimulated Raman transitions, clarifying the role of lightshift and geometrical artifacts in experimental setups.

Findings

Lightshift naturally arises in multilevel Raman transitions.

Application to alkali-metal atoms, especially cesium.

Identification of geometrical artifacts affecting experiments.

Abstract

We consider the stimulated Raman transition between two long-lived states via multiple intermediate states, such as between hyperfine ground states in the alkali-metal atoms. We present a concise treatment of the general, multilevel, off-resonant case, and we show how the lightshift emerges naturally in this approach. We illustrate our results by application to alkali-metal atoms and we make specific reference to cesium. We comment on some artifacts, due solely to the geometrical overlap of states, which are relevant to existing experiments.