Time-averaged adiabatic ring potential for ultracold atoms
Quantum Gases
2011-10-12 v3
Abstract
We report the experimental realisation 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 11s and the ring radius was continuously varied from 50m to 261m. An efficient method of loading the ring from a conventional TOP 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.
Cite
@article{arxiv.1102.2895,
title = {Time-averaged adiabatic ring potential for ultracold atoms},
author = {B. E. Sherlock and M. Gildemeister and E. Owen and E. Nugent and C. J. Foot},
journal= {arXiv preprint arXiv:1102.2895},
year = {2011}
}