Controlled creation of a singular spinor vortex by circumventing the Dirac belt trick.

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ID: 66811
2019
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Abstract
Persistent topological defects and textures are particularly dramatic consequences of superfluidity. Among the most fascinating examples are the singular vortices arising from the rotational symmetry group SO(3), with surprising topological properties illustrated by Dirac's famous belt trick. Despite considerable interest, controlled preparation and detailed study of vortex lines with complex internal structure in fully three-dimensional spinor systems remains an outstanding experimental challenge. Here, we propose and implement a reproducible and controllable method for creating and detecting a singular SO(3) line vortex from the decay of a non-singular spin texture in a ferromagnetic spin-1 Bose-Einstein condensate. Our experiment explicitly demonstrates the SO(3) character and the unique spinor properties of the defect. Although the vortex is singular, its core fills with atoms in the topologically distinct polar magnetic phase. The resulting stable, coherent topological interface has analogues in systems ranging from condensed matter to cosmology and string theory.
Reference Key
weiss2019controllednature Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Weiss, L S;Borgh, M O;Blinova, A;Ollikainen, T;Möttönen, M;Ruostekoski, J;Hall, D S;
Journal Nature communications
Year 2019
DOI
10.1038/s41467-019-12787-1
URL
Keywords
bose-einstein condensate condensed matter physics fluid dynamics superradiance vortex

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