Influence of the atomic-wall collision elasticity on the coherent population trapping resonance shape

TL;DR

This paper presents a theoretical study on how the elasticity of atomic-wall collisions influences the shape of coherent population trapping resonances in a buffer-gas-free cylindrical cell, highlighting the role of elastic collision probability.

Contribution

The study introduces a model accounting for elastic and inelastic wall collisions and analyzes their impact on CPT resonance shape, advancing understanding of atomic interactions in confined geometries.

Findings

Resonance shape depends on elastic collision probability.

Elastic collisions significantly alter CPT resonance profiles.

The model predicts how wall collision properties influence resonance characteristics.

Abstract

We studied theoretically a coherent population trapping resonance formation in cylindrical cell without buffer gas irradiated by a narrow laser beam. We take into account non-zero probabilities of elastic ("specular") and inelastic ("sticking") collision between the atom and the cell wall. We have developed a theoretical model based on averaging over the random Ramsey pulse sequences of times that atom spent in and out of the beam. It is shown that the shape of coherent population trapping resonance line depends on the probability of elastic collision.