Core Structure and Non-Abelian Reconnection of Defects in a Biaxial Nematic Spin-2 Bose-Einstein Condensate

Borgh, Magnus O. and Ruostekoski, Janne (2016) Core Structure and Non-Abelian Reconnection of Defects in a Biaxial Nematic Spin-2 Bose-Einstein Condensate. Physical Review Letters, 117 (27). ISSN 0031-9007

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      Abstract

      We calculate the energetic structure of defect cores and propose controlled methods to imprint a nontrivially entangled vortex pair that undergoes non-Abelian vortex reconnection in a biaxial nematic spin-2 condensate. For a singular vortex, we find three superfluid cores in addition to depletion of the condensate density. These exhibit order parameter symmetries that are different from the discrete symmetry of the biaxial nematic phase, forming an interface between the defect and the bulk superfluid. We provide a detailed analysis of phase mixing in the resulting vortex cores and find an instability dependent upon the orientation of the order parameter. We further show that the spin-2 condensate is a promising system for observing spontaneous deformation of a point defect into an “Alice ring” that has so far avoided experimental detection.

      Item Type: Article
      Faculty \ School: Faculty of Science > School of Chemistry
      Related URLs:
      Depositing User: Pure Connector
      Date Deposited: 14 Jan 2017 00:08
      Last Modified: 09 Apr 2019 11:52
      URI: https://ueaeprints.uea.ac.uk/id/eprint/62096
      DOI: 10.1103/PhysRevLett.117.275302

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