Abstract
We report the experimental realization of a versatile ring trap for ultracold atoms. The ring geometry is created by the time-averaged adiabatic potential resulting from the application of an oscillating magnetic bias field to a rf-dressed quadrupole trap. Lifetimes for a Bose-Einstein condensate in the ring exceed and the ring radius was continuously varied from to . An efficient method of loading the ring from a conventional time-averaged orbiting potential trap is presented together with a rotation scheme which introduces angular momentum into the system. The ring presents an opportunity to study the superfluid properties of a condensate in a multiply connected geometry and also has applications for matter-wave interferometry.
- Received 15 February 2011
- Publisher error corrected 4 May 2011
DOI:https://doi.org/10.1103/PhysRevA.83.043408
©2011 American Physical Society
Corrections
4 May 2011