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Topological classification of vortex-core structures of spin-1 Bose-Einstein condensates

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arxiv 1204.0202 v2 pith:UATWWYVU submitted 2012-04-01 cond-mat.quant-gas hep-phhep-th

Shingo Kobayashi , Yuki Kawaguchi , Muneto Nitta , Masahito Ueda This is my paper · ORCID
classification cond-mat.quant-gashep-phhep-th
keywords vortex-corestructuresbose-einsteincondensatescoremethodorderparameter
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We classify vortex-core structures according to the topology of the order parameter space. By developing a method to characterize how the order parameter changes inside the vortex core. We apply this method to the spin-1 Bose-Einstein condensates and show that the vortex-core structures are classified by winding numbers that are locally defined in the core region. We also show that a vortex-core structure with a nontrivial winding number can be stabilized under a negative quadratic Zeeman effect.

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