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Effects of Dipole–Dipole Interaction on Vortex Motion in Bose–Einstein Condensates
- Source :
- Journal of Low Temperature Physics. 204:1-11
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- In this paper, we study the dynamics of a single vortex and a corotating vortex pair in a quasi-two-dimensional Bose–Einstein condensate. The numerical results are obtained by solving the Gross–Pitaevskii equation. It is shown that the vortex motion is strongly dependent on the dipole–dipole interaction (DDI). For a single vortex, the periodic motion occurs with increasing dipole strength. The x-coordinate and y-coordinate as a function of time close to the shape of cosine wave and triangular wave when DDI is an isotropic repulsive interaction, respectively. In addition, it is evident that strong and anisotropic DDI makes the movement of vortex become fast and the amplitude enlarges. In the case of a corotating vortex pair, the dynamics is qualitatively consistent with a single vortex for weak dipole strength. Moreover, the periodic dynamics only appears for strong and anisotropic DDI and more rapid vortex motion is indicated.
- Subjects :
- Condensed Matter::Quantum Gases
Physics
Isotropy
Dynamics (mechanics)
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
010305 fluids & plasmas
law.invention
Vortex
Periodic function
Dipole
Amplitude
law
Condensed Matter::Superconductivity
Quantum electrodynamics
0103 physical sciences
General Materials Science
010306 general physics
Anisotropy
Bose–Einstein condensate
Subjects
Details
- ISSN :
- 15737357 and 00222291
- Volume :
- 204
- Database :
- OpenAIRE
- Journal :
- Journal of Low Temperature Physics
- Accession number :
- edsair.doi...........b36f74236a84083fd01396b10749f894