Vortex pump for Bose-Einstein condensates utilizing a time-averaged orbiting potential trap

Pekko Kuopanportti, Brian P. Anderson, Mikko Möttönen

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

We show that topological vortex pumping can be implemented for a dilute Bose-Einstein condensate confined in a magnetic time-averaged orbiting potential trap with axial optical confinement. Contrary to earlier proposals for the vortex pump, we do not employ an additional optical potential to trap the condensate in the radial direction, but instead, the radial confinement is provided by the magnetic field throughout the pumping cycle. By performing numerical simulations based on the spin-1 Gross-Pitaevskii equation, we find that several pumping cycles can be carried out to produce a highly charged vortex before a majority of the particles escape from the trap or before the vortex splits into singly charged vortices. On the other hand, we observe that an additional, relatively weak optical plug potential is efficient in preventing splitting and reducing particle loss. With these results, we hope to bring the vortex pump closer to experimental realization.

Original languageEnglish (US)
Article number033623
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume87
Issue number3
DOIs
StatePublished - Mar 25 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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