1204.0202 (Shingo Kobayashi et al.)

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

Shingo Kobayashi, Yuki Kawaguchi, Muneto Nitta, Masahito Ueda

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.

View original: http://arxiv.org/abs/1204.0202