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http://hdl.handle.net/2445/9581
Title: | Off-axis vortices in trapped Bose-condensed gases: Angular momentum and frequency splitting |
Author: | Guilleumas, Montserrat Graham, R. (Robert), 1942- |
Keywords: | Condensació de Bose-Einstein Estadística quàntica Ionització Bose-Einstein condensation Quantum statistics Ionization |
Issue Date: | 2001 |
Publisher: | The American Physical Society |
Abstract: | We consider noncentered vortices and their arrays in a cylindrically trapped Bose-Einstein condensate at zero temperature. We study the kinetic energy and the angular momentum per particle in the Thomas-Fermi regime and their dependence on the distance of the vortices from the center of the trap. Using a perturbative approach with respect to the velocity field of the vortices, we calculate, to first order, the frequency shift of the collective low-lying excitations due to the presence of an off-center vortex or a vortex array, and compare these results with predictions that would be obtained by the application of a simple sum-rule approach, previously found to be very successful for centered vortices. It turns out that the simple sum-rule approach fails for off-centered vortices. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.64.033607 |
It is part of: | Physical Review A, 2001, vol. 64, núm. 3, p. 033607. |
URI: | http://hdl.handle.net/2445/9581 |
Related resource: | http://dx.doi.org/10.1103/PhysRevA.64.033607 |
ISSN: | 1050-2947 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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