# Interferometric measurement of micro-g acceleration with levitated atoms

## TL;DR

This paper demonstrates the use of magnetic levitation with Bose-Einstein condensates to perform atom interferometry for micro-g acceleration measurements, achieving long observation times comparable to drop-tower experiments.

## Contribution

It introduces a novel approach using magnetic levitation for atom interferometry, enabling extended measurement times and detailed force field analysis.

## Key findings

- Achieved 1 second observation times with levitated atoms
- Studied the curvature of the force field affecting the atoms
- Demonstrated phase-shifting effects in the interferometer paths

## Abstract

The sensitivity of atom interferometers is usually limited by the observation time of a free falling cloud of atoms in Earth's gravitational field. Considerable efforts are currently made to increase this observation time, e.g. in fountain experiments, drop towers and in space. In this article, we experimentally study and discuss the use of magnetic levitation for interferometric precision measurements. We employ a Bose-Einstein condensate of cesium atoms with tuneable interaction and a Michelson interferometer scheme for the detection of micro-g acceleration. In addition, we demonstrate observation times of 1s, which are comparable to current drop-tower experiments, we study the curvature of our force field, and we observe the effects of a phase-shifting element in the interferometer paths.