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Internal structure and stability of vortices in a dipolar spinor Bose-Einstein condensate by Borgh, Magnus O.; Lovegrove, Justin; Ruostekoski, Janne is a scholarly article available to read on EtoBox.

What is Internal structure and stability of vortices in a dipolar spinor Bose-Einstein condensate about?

We demonstrate how dipolar interactions can have pronounced effects on the structure of vortices in atomic spinor Bose-Einstein condensates and illustrate generic physical principles that apply across dipolar spinor systems. We then find and analyze the cores of singular vortices with non-Abelian charges in the point-group symmetry of a spin-3 $^{52}$Cr condensate. Using a simpler model system, we analyze the underlying dipolar physics and show how a characteristic length scale arising from the magnetic dipolar coupling interacts with the hierarchy of healing lengths of the s-wave scattering, and leads to simple criteria for the core structure: When the interactions both energetically favor the ground-state spin condition, such as in the spin-1 ferromagnetic phase, the size of singular vortices is restricted to the shorter spin-dependent healing length. Conversely, when the interactions compete (e.g., in the spin-1 polar phase), we find that the core of a singular vortex is enlarged by increasing dipolar coupling. We further demonstrate how the spin-alignment arising from the interaction anisotropy is manifest in the appearance of a ground-state spin-vortex line that is oriented pe

Author

Borgh, Magnus O.; Lovegrove, Justin; Ruostekoski, Janne

Published

2017

Language

EN