Pulsed pumping of a Bose-Einstein condensate

TL;DR

This paper investigates a pulsed transfer method to coherently move atoms between two Bose-Einstein condensates in different hyperfine states, revealing resonance effects and insights relevant to pumped atom lasers.

Contribution

It demonstrates a pulsed transfer technique that reveals resonance phenomena in BECs, advancing understanding of atom transfer processes for atom laser development.

Findings

Resonance observed in transfer timing, temperature, and number

Effective pulsed transfer enhances coherence between BECs

Insights applicable to pumped atom laser design

Abstract

In this work, we examine a system for coherent transfer of atoms into a Bose-Einstein condensate. We utilize two spatially separate Bose-Einstein condensates in different hyperfine ground states held in the same dc magnetic trap. By means of a pulsed transfer of atoms, we are able to show a clear resonance in the timing of the transfer, both in temperature and number, from which we draw conclusions about the underlying physical process. The results are discussed in the context of the recently demonstrated pumped atom laser.