Effect of the nearby levels on the resonance fluorescence spectrum of the atom-field interaction

TL;DR

This paper investigates how nearby atomic energy levels influence the resonance fluorescence spectrum in the Jaynes-Cummings model, revealing Stark shift effects that cause peak displacement and asymmetry, with results for coherent and thermal fields.

Contribution

It introduces the consideration of nearby levels in the Jaynes-Cummings model, showing their impact on resonance fluorescence spectra, including Stark shift-induced effects.

Findings

Nearby levels cause peak displacement in the spectrum.

Stark shift induces asymmetry in the fluorescence peaks.

Results vary between coherent and thermal field conditions.

Abstract

We study the resonance fluorescence in the Jaynes-Cummings model when nearby levels are taking into account. We show that the Stark shift produced by such levels generates a displacement of the peaks of the resonance fluorescence due to an induced effective detuning and also induces an asymmetry. Specific results are presented assuming a coherent and a thermal fields.