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Non-Abelian Topological Excitations in Spinor Condensates |
| ZHANG Yun-Bo1,2;Harri Mäkelä2;Kalle-Antti Suominen2 |
| 1Department of Physics and Institute of Theoretical Physics, Shanxi University, Taiyuan 03006
2Department of Physics, University of Turku, FIN-20014 Turun Yliopisto, Finland |
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| Cite this article: |
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ZHANG Yun-Bo, Harri Mä, kelä et al 2005 Chin. Phys. Lett. 22 536-538 |
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Abstract We investigate the topological defects in atomic spin-1 and spin-2 Bose--Einstein condensates by applying the homotopy group theory. With this rigorous approach we clarify the previously controversial identification of symmetry groups and order parameter spaces for the spin-1 case, and show that the spin-2 case provides a rare example of a physical system with non-Abelian line defects, and the possibility to have winding numbers of 1/3 and its multiples.
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| Keywords:
03.75.Mn
03.75.Lm
05.30.Jp
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Published: 01 March 2005
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| PACS: |
03.75.Mn
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(Multicomponent condensates; spinor condensates)
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03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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05.30.Jp
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(Boson systems)
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