Monopole core instability and Alice rings in spinor Bose-Einstein condensates

Details Monopole core instability and Alice rings in spinor Bose-Einstein condensates Monopole core instability and Alice rings in spinor Bose-Einstein condensates

2003-07-25

arxiv.org/abs/cond-mat/0307651v1

Phys.Rev.Lett. 91 (2003) 190402; Erratum-ibid. 97 (2006) 069902

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.91.190402

We show how the length scale hierarchy, resulting from different interaction strengths in an optically-trapped spin-1 sodium-23 Bose-Einstein condensate, can lead to intriguing core deformations in singular topological defects. In particular, a point defect can be unstable with respect to the formation of a stable half-quantum vortex ring (an Alice ring), providing a realistic scheme to use dissipation as a sophisticated state engineering tool. We compute the threshold for stability of the point monopole, which is beyond the current experimental regime.

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