Vortex-antivortex physics in shell-shaped Bose-Einstein condensates

  title={Vortex-antivortex physics in shell-shaped Bose-Einstein condensates},
  author={Karmela Padavi'c and Kuei Sun and Courtney Lannert and Smitha Vishveshwara},
  journal={Physical Review A},
Shell-shaped hollow Bose-Einstein condensates (BECs) exhibit behavior distinct from their filled counterparts and have recently attracted attention due to their potential realization in microgravity settings. Here we study distinct features of these hollow structures stemming from vortex physics and the presence of rotation. We focus on a vortex-antivortex pair as the simplest configuration allowed by the constraints on superfluid flow imposed by the closed-surface topology. In the two… 

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