Structural instability of vortices in Bose-Einstein condensates - art. no.140403

Authors
Garcia-Ripoll, JJ Molina-Terriza, G Perez-Garcia, VM Torner, L
Citation
Jj. Garcia-ripoll et al., Structural instability of vortices in Bose-Einstein condensates - art. no.140403, PHYS REV L, 8714(14), 2001, pp. 0403
Citations number
22
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8714
Issue
14
Year of publication
2001
Database
ISI
SICI code
0031-9007(20011001)8714:14<0403:SIOVIB>2.0.ZU;2-2
Abstract
In this paper we study a gaseous Bose-Einstein condensate and show the foll owing: (i) A minimum value of the interaction is needed for the existence o f stable persistent currents. (ii) Vorticity is not a fundamental invariant of the system, as there exists a conservative mechanism which can destroy a vortex and change its sign. (iii) This mechanism is suppressed by strong interactions.