Topological Winding and Unwinding in Metastable Bose-Einstein Condensates

Details Topological Winding and Unwinding in Metastable Bose-Einstein Condensates Topological Winding and Unwinding in Metastable Bose-Einstein Condensates

2007-04-24

arxiv.org/abs/0704.3114v3

Phys. Rev. Lett. 100, 060401 (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.100.060401

Topological winding and unwinding in a quasi-one-dimensional metastable Bose-Einstein condensate are shown to be manipulated by changing the strength of interaction or the frequency of rotation. Exact diagonalization analysis reveals that quasidegenerate states emerge spontaneously near the transition point, allowing a smooth crossover between topologically distinct states. On a mean-field level, the transition is accompanied by formation of grey solitons, or density notches, which serve as an experimental signature of this phenomenon.

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