Structural Instability of Vortices in Bose-Einstein Condensates
Structural Instability of Vortices in Bose-Einstein Condensates
In this paper we study a gaseous Bose-Einstein condensate and show the following: (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 …