Versatile two-dimensional potentials for ultra-cold atoms

TL;DR

This paper introduces a method to create smooth, versatile two-dimensional potentials for ultra-cold atoms using rapid laser beam scanning with an acousto-optical modulator, enabling improved trap homogeneity for advanced quantum experiments.

Contribution

The paper presents a novel technique combining rapid laser scanning and feed-forward control to generate high-quality 2D potentials for ultra-cold atom trapping.

Findings

Successful implementation of a 2D scanning laser system

Enhanced homogeneity of atom traps achieved

Potential for creating complex trapping geometries like toroidal traps

Abstract

We propose and investigate a technique for generating smooth two-dimensional potentials for ultra-cold atoms based on the rapid scanning of a far-detuned laser beam using a two-dimensional acousto-optical modulator (AOM). We demonstrate the implementation of a feed-forward mechanism for fast and accurate control of the spatial intensity of the laser beam, resulting in improved homogeneity for the atom trap. This technique could be used to generate a smooth toroidal trap that would be useful for static and dynamic experiments on superfluidity and persistent currents with ultra-cold atoms.