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Vortices and hysteresis in a rotating Bose-Einstein condensate with anharmonic confinement

Jackson, AD and Kavoulakis, Georgios LU (2004) In Physical Review A (Atomic, Molecular and Optical Physics) 70(2).
Abstract
We examine an effectively repulsive Bose-Einstein condensate of atoms that rotates in a quadratic-plus-quartic trapping potential. We investigate the phase diagram of the system as a function of the angular frequency of rotation and of the coupling constant, demonstrating that there are phase transitions between multiply and singly quantized vortex states. We also show that states of different circulation can be metastable and, as a result, the gas can exhibit hysteresis as the angular frequency of rotation of the trap is varied. The simplicity of the picture that emerges for small coupling strengths suggests that this system may be attractive for studies of phase transitions.
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
70
issue
2
publisher
American Physical Society (APS)
external identifiers
  • wos:000223717400101
  • scopus:19544368285
ISSN
1050-2947
DOI
10.1103/PhysRevA.70.023601
language
English
LU publication?
yes
id
f26e2627-a54f-4a78-bc32-a71cb3259bdf (old id 905421)
date added to LUP
2008-01-10 17:55:25
date last changed
2017-01-01 04:41:08
@article{f26e2627-a54f-4a78-bc32-a71cb3259bdf,
  abstract     = {We examine an effectively repulsive Bose-Einstein condensate of atoms that rotates in a quadratic-plus-quartic trapping potential. We investigate the phase diagram of the system as a function of the angular frequency of rotation and of the coupling constant, demonstrating that there are phase transitions between multiply and singly quantized vortex states. We also show that states of different circulation can be metastable and, as a result, the gas can exhibit hysteresis as the angular frequency of rotation of the trap is varied. The simplicity of the picture that emerges for small coupling strengths suggests that this system may be attractive for studies of phase transitions.},
  author       = {Jackson, AD and Kavoulakis, Georgios},
  issn         = {1050-2947},
  language     = {eng},
  number       = {2},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Vortices and hysteresis in a rotating Bose-Einstein condensate with anharmonic confinement},
  url          = {http://dx.doi.org/10.1103/PhysRevA.70.023601},
  volume       = {70},
  year         = {2004},
}