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Structural instability of vortices in Bose-Einstein condensates

Juan J. Garcia-Ripoll·Gabriel Molina-Terriza·Victor M. Perez-Garcia·Lluis Torner
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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.

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Juan J. Garcia-Ripoll, Gabriel Molina-Terriza, Victor M. Perez-Garcia, Lluis Torner. 2001-06-12. Structural instability of vortices in Bose-Einstein condensates. https://doi.org/10.1103/physrevlett.87.140403

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