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APS » Journals » Phys. Rev. Lett. » Volume 100 » Issue 6
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Phys. Rev. Lett. 100, 060401 (2008) [4 pages]

Topological Winding and Unwinding in Metastable Bose-Einstein Condensates

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Rina Kanamoto1, Lincoln D. Carr2, and Masahito Ueda3,4
1Department of Physics, University of Arizona, Tucson, Arizona, 85721, USA
2Department of Physics, Colorado School of Mines, Golden, Colorado, 80401, USA
3Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
4ERATO, JST, Bunkyo-ku, Tokyo 113-8656, Japan

Received 24 April 2007; published 12 February 2008

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 gray solitons, or density notches, which serve as an experimental signature of this phenomenon.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.060401
DOI:
10.1103/PhysRevLett.100.060401
PACS:
03.75.Hh, 03.75.Lm
 
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