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

Journal Article · Sun Aug 01 00:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.023601· OSTI ID:20645928

Jackson, A D ^[1]; Kavoulakis, G M ^[2]

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1. Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen O (Denmark)
2. Mathematical Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund (Sweden)

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.

• OSTI ID: 20645928
• Journal Information: Physical Review. A, Vol. 70, Issue 2; Other Information: DOI: 10.1103/PhysRevA.70.023601; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
CONFINEMENT
COUPLING
COUPLING CONSTANTS
HYSTERESIS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
POTENTIALS
ROTATION
TRAPPING
TRAPS
VORTICES