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Generating vortex rings in Bose-Einstein condensates in the line-source approximation
- Source :
- Recercat. Dipósit de la Recerca de Catalunya, instname, Dipòsit Digital de la UB, Universidad de Barcelona
- Publication Year :
- 2002
- Publisher :
- arXiv, 2002.
-
Abstract
- We present a numerical method for generating vortex rings in Bose-Einstein condensates confined in axially symmetric traps. The vortex ring is generated using the line-source approximation for the vorticity, i.e., the rotational of the superfluid velocity field is different from zero only on a circumference of given radius located on a plane perpendicular to the symmetry axis and coaxial with it. The particle density is obtained by solving a modified Gross-Pitaevskii equation that incorporates the effect of the velocity field. We discuss the appearance of density profiles, the vortex core structure and the vortex nucleation energy, i.e., the energy difference between vortical and ground-state configurations. This is used to present a qualitative description of the vortex dynamics.<br />Comment: Accepted for publication in Phys. Rev. A
- Subjects :
- Physics
Condensed Matter::Quantum Gases
Condensed matter physics
Condensed Matter (cond-mat)
FOS: Physical sciences
Condensed Matter
Vorticity
Bose-Einstein condensation
Vortex-motion
Atomic and Molecular Physics, and Optics
Vortex ring
Vortex
law.invention
Vortex motion
Superfluidity
Moviment de vòrtexs
law
Vortex stretching
Condensed Matter::Superconductivity
Condensació de Bose-Einstein
Burgers vortex
Axial symmetry
Bose–Einstein condensate
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Recercat. Dipósit de la Recerca de Catalunya, instname, Dipòsit Digital de la UB, Universidad de Barcelona
- Accession number :
- edsair.doi.dedup.....13998e7e5bb1985f8a382d709e4d7316
- Full Text :
- https://doi.org/10.48550/arxiv.cond-mat/0202312