Quantized circular motion of a trapped Bose-Einstein condensate: Coherent rotation and vortices
| Autor: | Karl-Peter Marzlin, Weiping Zhang |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Quantum Physics Statistical Mechanics (cond-mat.stat-mech) Condensed matter physics Anharmonicity FOS: Physical sciences Angular velocity Trapping Rotation Atomic and Molecular Physics and Optics Vortex state law.invention Vortex Circular motion law Quantum electrodynamics Physics::Atomic Physics Quantum Physics (quant-ph) Condensed Matter - Statistical Mechanics Bose–Einstein condensate |
| Zdroj: | Physical Review A. 57:4761-4769 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.57.4761 |
| Popis: | We study the creation of vortex states in a trapped Bose-Einstein condensate by a rotating force. For a harmonic trapping potential the rotating force induces only a circular motion of the whole condensate around the trap center which does not depend on the interatomic interaction. For the creation of a pure vortex state it is necessary to confine the atoms in an anharmonic trapping potential. The efficiency of the creation can be greatly enhanced by a sinusodial variation of the force's angular velocity. We present analytical and numerical calculations for the case of a quartic trapping potential. The physical mechanism behind the requirement of an anharmonic trapping potential for the creation of pure vortex states is explained. [Changes: new numerical and analytical results are added and the representation is improved.] Comment: 13 Pages, 5 Figures, RevTex |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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