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Borgh, Magnus O. 
ORCID: https://orcid.org/0000-0003-4243-7051 and Ruostekoski, Janne
(2013)
Topological interface physics of defects and textures in spinor Bose-Einstein condensates.
Physical Review A, 87 (3).
ISSN 1050-2947
Abstract
We provide a detailed description of our previously proposed scheme for topological interface engineering with constructed defects and textures perforating across coherent interfaces between different broken symmetries [Borgh and Ruostekoski, Phys. Rev. Lett. 109, 015302 (2012)]. We consider a spin-1 Bose-Einstein condensate, in which polar and ferromagnetic phases are prepared in spatially separated regions. We show that a stable coherent interface is established between the two phases, allowing defects of different topology to connect continuously across the boundary. We provide analytic constructions of interface-crossing defect solutions that could be experimentally phase imprinted using existing technology. By numerically minimizing the energy, we calculate the core structures of interface-crossing defect configurations. We demonstrate nontrivial core deformations to considerably more complex structures, such as the formation of an arch-shaped half-quantum line defect, an Alice arch, at the interface, with the topological charge of a point defect, whose emergence may be understood by the “hairy ball” theorem. Another example of an energetically stable object is the connection of a coreless vortex to a pair of half-quantum vortices. We show that rotation leads to spontaneous nucleation of defects in which a coreless vortex continuously transforms to a half-quantum vortex across the interface.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Chemistry (former - to 2024) |
| UEA Research Groups: | Faculty of Science > Research Groups > Quantum Fluids (former - to 2024) Faculty of Science > Research Groups > Centre for Photonics and Quantum Science Faculty of Science > Research Groups > Quantum Matter |
| Depositing User: | Pure Connector |
| Date Deposited: | 13 Oct 2016 08:00 |
| Last Modified: | 07 Nov 2024 12:39 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/60904 |
| DOI: | 10.1103/PhysRevA.87.033617 |
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