| Issue |
Europhys. Lett.
Volume 46, Number 3, May I 1999
|
|
|---|---|---|
| Page(s) | 275 - 281 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i1999-00256-8 | |
| Published online | 01 September 2002 | |
Macroscopic angular-momentum states of Bose-Einstein condensates in toroidal traps
1
International Centre for Theoretical Physics - I-34100, Trieste,
Italy
2
International School for
Advanced Studies and Istituto Nazionale di Fisica
della Materia - I-34014, Trieste, Italy
Received:
14
August
1998
Accepted:
11
February
1999
We study the stability of a rotating repulsive-atom
Bose-Einstein condensate
in a toroidal trap. The resulting macroscopic
angular-momentum states with integer
vorticity l spread radially, lowering
rotational energies. These states are robust against vorticity-lowering
decays, with estimated metastability barriers capable of sustaining
large angular
momenta (
) for typical parameters. We identify the
centrifugally squashed l-dependent density
profile as a possible signature of condensate rotation and superfluidity.
PACS: 03.75.Fi – Phase coherent atomic ensembles; quantum condensation phenomena / 05.30.Jp – Boson systems / 32.80.Pj – Optical cooling of atoms; trapping
© EDP Sciences, 1999
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