10-1088-1367-2630-18-3-035003-meta.pdf (1.85 MB)
Bose–Einstein condensation in large time-averaged optical ring potentials
journal contribution
posted on 2023-06-09, 04:39 authored by Thomas A Bell, Jake A P Glidden, Leif Humbert, Michael W J Bromley, Simon A Haine, Matthew J Davis, Tyler W Neely, Mark A Baker, Halina Rubinsztein-DunlopInterferometric 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 µm 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.
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Publication status
- Published
File Version
- Published version
Journal
New Journal of PhysicsISSN
1367-2630Publisher
IOP PublishingExternal DOI
Issue
3Volume
18Page range
5003Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Atomic, Molecular and Optical Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-01-12First Open Access (FOA) Date
2017-01-12First Compliant Deposit (FCD) Date
2017-01-12Usage metrics
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