Trap Frequency Measurement with a Pulsed Atom Laser

TL;DR

This paper introduces a new single-shot method using a pulsed atom laser to measure trap frequencies in Bose-Einstein Condensates with high precision, surpassing previous methods and applicable to higher frequencies.

Contribution

The paper presents a novel atom laser-based technique for precise, single-shot trap frequency measurement, including a reconstructive aliasing approach for higher frequencies.

Findings

Achieved 39 ppm accuracy in trap frequency measurement.

Method improves precision by a factor of three over previous techniques.

Applicable to trap frequencies more than three times the sampling frequency.

Abstract

We describe a novel method of single-shot trap frequency measurement for a confined Bose-Einstein Condensate, which uses an atom laser to repeatedly sample the mean velocity of trap oscillations as a function of time. The method is able to determine the trap frequency to an accuracy of 39~ppm (16~mHz) in a single experimental realization, improving on the literature by a factor of three. Further, we show that by employing a reconstructive aliasing approach our method can be applied to trap frequencies more than a factor of 3 greater than the sampling frequency.