Structural instability of vortices in Bose-Einstein condensates

Details Structural instability of vortices in Bose-Einstein condensates Structural instability of vortices in Bose-Einstein condensates

2001-06-12

arxiv.org/abs/cond-mat/0106210v1

Phys. Rev. Lett. 87, 140403 (2001)

Physics

Condensed Matter

Soft Condensed Matter

4 pages with 3 figures. Submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.87.140403

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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