Structural instability of vortices in Bose-Einstein condensates
arXiv:cond-mat/0106210 · doi:10.1103/PhysRevLett.87.140403
Abstract
In this paper we study a gaseous Bose-Einstein condensate (BEC) and show that: (i) A minimum value of the interaction is needed for the existence of 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.
4 pages with 3 figures. Submitted to Phys. Rev. Lett
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