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Lovegrove, Justin, Borgh, Magnus O. 
ORCID: https://orcid.org/0000-0003-4243-7051 and Ruostekoski, Janne
(2012)
Energetically stable singular vortex cores in an atomic spin-1 Bose-Einstein condensate.
Physical Review A, 86 (1).
ISSN 1050-2947
Abstract
We analyze the structure and stability of singular singly quantized vortices in a rotating spin-1 Bose-Einstein condensate. We show that the singular vortex can be energetically stable in both the ferromagnetic and polar phases despite the existence of a lower-energy nonsingular coreless vortex in the ferromagnetic phase. The spin-1 system exhibits an energetic hierarchy of length scales resulting from different interaction strengths, and we find that the vortex cores deform to a larger size determined by the characteristic length scale of the spin-dependent interaction. We show that in the ferromagnetic phase the resulting stable core structure, despite apparent complexity, can be identified as a single polar core with an axially symmetric density profile which is nonvanishing everywhere. In the polar phase, the energetically favored core deformation leads to a splitting of a singly quantized vortex into a pair of half-quantum vortices that preserves the topology of the vortex outside the extended core region, but breaks the axial symmetry of the core. The resulting half-quantum vortices exhibit nonvanishing ferromagnetic cores.
| Item Type: | Article |
|---|---|
| Additional Information: | Erratum available at: doi.org/10.1103/PhysRevA.89.039902 |
| Faculty \ School: | Faculty of Science > School of Chemistry |
| Depositing User: | Pure Connector |
| Date Deposited: | 13 Oct 2016 08:00 |
| Last Modified: | 09 Feb 2023 13:44 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/60905 |
| DOI: | 10.1103/PhysRevA.86.013613 |
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