Publication
Title
Radial vortex core oscillations in Bose-Einstein condensates
Author
Abstract
Dilute ultracold quantum gases form an ideal and highly tunable system in which superfluidity can be studied. Recently quantum turbulence in Bose-Einstein condensates was reported [PRL 103, 045310 (2009)], opening up a new experimental system that can be used to study quantum turbulence. A novel feature of this system is that vortex cores now have a finite size. This means that the vortices are no longer one dimensional features in the condensate, but that the radial behaviour and excitations might also play an important role in the study of quantum turbulence in Bose-Einstein condensates. In this paper we investigate these radial modes using a simplified variational model for the vortex core. This study results in the frequencies of the radial modes, which can be compared with the frequencies of the thoroughly studied Kelvin modes. From this comparison we find that the lowest (l = 0) radial mode has a frequency in the same order of magnitude as the Kelvin modes. However the radial modes still have a larger energy than the Kelvin modes, meaning that the Kelvin modes will still constitute the preferred channel for energy decay in quantum turbulence.
Language
French, English
Source (journal)
The European physical journal. Special topics. - -
Publication
2017
ISSN
1951-6355 [print]
1951-6401 [online]
DOI
10.1140/EPJST/E2016-60374-Y
Volume/pages
226 :12 (2017) , p. 2829-2836
ISI
000406029100013
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Quantum turbulence in atomic and solid state Bose-Einstein condensates.
Quantum simulation of polaronic effects in quantum gases.
Nonlinear Transport of the Wigner Solid on a Superfluid 4He in a Quasi-One- Dimensional Channel.
Superfluidity and superconductivity in multicomponent quantum condensates.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 26.07.2017
Last edited 09.10.2023
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