Interferometric measurement of micro-g acceleration with levitated atoms

A Di Carli, C D Colquhoun, S Kuhr, E Haller

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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.
Original languageEnglish
Article number053028
Number of pages11
JournalNew Journal of Physics
Volume21
Issue number5
Early online date23 Apr 2019
DOIs
Publication statusPublished - 22 May 2019

Keywords

  • interferometry
  • BEC
  • metrology
  • acceleration measurement

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