Bose-Einstein condensation in large time-averaged optical ring potentials

Bell, Thomas A., Glidden, Jake A. P., Humbert, Leif, Bromley, Michael W. J., Haine, Simon A., Davis, Matthew J., Neely, Tyler W., Baker, Mark A. and Rubinsztein-Dunlop, Halina (2016) Bose-Einstein condensation in large time-averaged optical ring potentials. New Journal of Physics, 18 035003: 1-10. doi:10.1088/1367-2630/18/3/035003


Author Bell, Thomas A.
Glidden, Jake A. P.
Humbert, Leif
Bromley, Michael W. J.
Haine, Simon A.
Davis, Matthew J.
Neely, Tyler W.
Baker, Mark A.
Rubinsztein-Dunlop, Halina
Title Bose-Einstein condensation in large time-averaged optical ring potentials
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2016-03-01
Year available 2016
Sub-type Article (original research)
DOI 10.1088/1367-2630/18/3/035003
Open Access Status DOI
Volume 18
Issue 035003
Start page 1
End page 10
Total pages 10
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Collection year 2017
Language eng
Abstract Interferometric measurements with matter waves are established techniques for sensitive gravimetry, rotation sensing, and measurement of surface interactions, but compact interferometers will require techniques based on trapped geometries. In a step towards the realisation of matter wave interferometers in toroidal geometries, we produce a large, smooth ring trap for Bose?Einstein condensates using rapidly scanned time-averaged dipole potentials. The trap potential is smoothed by using the atom distribution as input to an optical intensity correction algorithm. Smooth rings with a diameter up to 300 ?m are demonstrated. We experimentally observe and simulate the dispersion of condensed atoms in the resulting potential, with good agreement serving as an indication of trap smoothness. Under time of flight expansion we observe low energy excitations in the ring, which serves to constrain the lower frequency limit of the scanned potential technique. The resulting ring potential will have applications as a waveguide for atom interferometry and studies of superfluidity.
Keyword Bose-Einstein condensate
Atom interferometry
Superfluid
Matter wave
Ring trap
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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