Quantum Elliptic Vortex in a Nematic-Spin Bose-Einstein Condensate.

  title={Quantum Elliptic Vortex in a Nematic-Spin Bose-Einstein Condensate.},
  author={Hiromitsu Takeuchi},
  journal={Physical review letters},
  volume={126 19},
  • H. Takeuchi
  • Published 8 September 2020
  • Physics
  • Physical review letters
We find a novel topological defect in a spin-nematic superfluid theoretically. A quantized vortex spontaneously breaks its axisymmetry, leading to an elliptic vortex in nematic-spin Bose-Einstein condensates with small positive quadratic Zeeman effect. The new vortex is considered the Joukowski transform of a conventional vortex. Its oblateness grows when the Zeeman length exceeds the spin healing length. This structure is sustained by balancing the hydrodynamic potential and the elasticity of… 

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