Light-shift spectroscopy of optically trapped atomic ensembles

TL;DR

This paper introduces a novel light-shift spectroscopy method that leverages the spatially dependent ac-Stark shift to extract key physical parameters of optically trapped cold atomic ensembles from a single measurement.

Contribution

The work presents a new spectroscopic technique that directly relates atomic distribution to transmission spectra, enabling rapid parameter extraction in cold atom experiments.

Findings

Accurately derived temperature, trap depth, lifetime, and atom number from single-shot data.

Demonstrated the method's effectiveness in real experimental conditions.

Provided a model linking atomic distribution with light-shift broadened spectra.

Abstract

We develop a method for extracting the physical parameters of interest for a dipole trapped cold atomic ensemble. This technique uses the spatially dependent ac-Stark shift of the trap itself to project the atomic distribution onto a light-shift broadened transmission spectrum. We develop a model that connects the atomic distribution with the expected transmission spectrum. We then demonstrate the utility of the technique by deriving the temperature, trap depth, lifetime, and trapped atom number from data that was taken in a single shot experimental measurement.