Topological interfaces crossed by defects and textures of continuous and discrete point group symmetries in spin-2 Bose-Einstein condensates

Baio, Giuseppe ORCID: https://orcid.org/0000-0003-4271-6894, Wheeler, Matthew T., Hall, David S., Ruostekoski, Janne and Borgh, Magnus O. ORCID: https://orcid.org/0000-0003-4243-7051 (2024) Topological interfaces crossed by defects and textures of continuous and discrete point group symmetries in spin-2 Bose-Einstein condensates. Physical Review Research, 6.

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Abstract

We systematically and analytically construct a set of spinor wave functions representing defects and textures that continuously penetrate interfaces between coexisting, topologically distinct magnetic phases in a spin-2 Bose-Einstein condensate. These include singular and nonsingular vortices carrying mass or spin circulation that connect across interfaces between biaxial- and uniaxial nematic, cyclic and ferromagnetic phases, as well as vortices terminating as monopoles on the interface ("boojums"). The biaxial-nematic and cyclic phases exhibit discrete polytope symmetries featuring non-Abelian vortices and we investigate a pair of non-commuting line defects within the context of a topological interface. By numerical simulations, we characterize the emergence of non-trivial defect core structures, including the formation of composite defects. Our results demonstrate the potential of spin-2 Bose-Einstein condensates as experimentally accessible platforms for exploring interface physics, offering a wealth of combinations of continuous and discrete symmetries.

Item Type: Article
Additional Information: ACKNOWLEDGMENTS: G.B. and M.O.B. as well as J.R. acknowledge financial support from the Engineering and Physical Sciences Research Council (EPSRC), Grants No. EP/V03832X/1 and No. EP/S002952/1, respectively. D.S.H. acknowledges support from National Science Foundation (NSF) Grant No. PHY-2207631. The numerical results presented in this paper were carried out on the High Performance Computing Cluster supported by the Research and Specialist Computing Support service at the University of East Anglia.
Uncontrolled Keywords: cond-mat.quant-gas,cond-mat.soft,hep-th,quant-ph,physics and astronomy(all) ,/dk/atira/pure/subjectarea/asjc/3100
Faculty \ School: Faculty of Science > School of Physics
UEA Research Groups: Faculty of Science > Research Groups > Centre for Photonics and Quantum Science
Faculty of Science > Research Groups > Quantum Fluids
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Depositing User: LivePure Connector
Date Deposited: 18 Jan 2024 01:36
Last Modified: 01 Feb 2024 03:08
URI: https://ueaeprints.uea.ac.uk/id/eprint/94198
DOI: 10.1103/PhysRevResearch.6.013046

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