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Stability of rotating states in a weakly interacting Bose-Einstein condensate

Kavoulakis, Georgios LU (2002) In Physical Review A (Atomic, Molecular and Optical Physics) 65(2).
Abstract
We investigate the lowest state of a rotating, weakly interacting Bose-Einstein condensate trapped in a harmonic confining potential that is driven by an infinitesimally asymmetric perturbation. Although in an axially symmetric confining potential the gas has an axially symmetric single-particle density distribution, we show that in the presence of the small asymmetric perturbation its lowest state is the one given by the mean-field approximation, which is a broken-symmetric state. We also estimate the rate of relaxation of angular momentum when the gas is no longer driven by the asymmetric perturbation and identify two regimes of "slow" and "fast" relaxation. States of certain symmetry are found to be more robust.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
65
issue
2
publisher
American Physical Society (APS)
external identifiers
  • wos:000173879500095
  • scopus:18744422468
ISSN
1050-2947
DOI
10.1103/PhysRevA.65.023602
language
English
LU publication?
yes
id
1ffe1c88-2cdb-47e7-b245-06340ca5fc13 (old id 910180)
date added to LUP
2008-01-23 17:02:04
date last changed
2017-01-01 04:37:28
@article{1ffe1c88-2cdb-47e7-b245-06340ca5fc13,
  abstract     = {We investigate the lowest state of a rotating, weakly interacting Bose-Einstein condensate trapped in a harmonic confining potential that is driven by an infinitesimally asymmetric perturbation. Although in an axially symmetric confining potential the gas has an axially symmetric single-particle density distribution, we show that in the presence of the small asymmetric perturbation its lowest state is the one given by the mean-field approximation, which is a broken-symmetric state. We also estimate the rate of relaxation of angular momentum when the gas is no longer driven by the asymmetric perturbation and identify two regimes of "slow" and "fast" relaxation. States of certain symmetry are found to be more robust.},
  author       = {Kavoulakis, Georgios},
  issn         = {1050-2947},
  language     = {eng},
  number       = {2},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Stability of rotating states in a weakly interacting Bose-Einstein condensate},
  url          = {http://dx.doi.org/10.1103/PhysRevA.65.023602},
  volume       = {65},
  year         = {2002},
}