Decay of a superfluid current of ultracold atoms in a toroidal trap

@inproceedings{Mathey2012DecayOA,
  title={Decay of a superfluid current of ultracold atoms in a toroidal trap},
  author={Amy C. Mathey and Charles W. Clark and Ludwig Mathey},
  year={2012}
}
Using a numerical implementation of the truncated Wigner approximation, we simulate the experiment reported by Ramanathan et al. in Phys. Rev. Lett. 106, 130401 (2011), in which a Bose-Einstein condensate is created in a toroidal trap and set into rotation via a phase imprinting technique. A potential barrier is then placed in the trap to study the decay of the superflow. We find that the current decays via thermally activated phase slips, which can also be visualized as vortices crossing the… CONTINUE READING

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