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Stabilization and Pumping of Giant Vortices in Dilute Bose–Einstein Condensates

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Abstract

Recently, it was shown that giant vortices with arbitrarily large quantum numbers can possibly created in dilute Bose–Einstein condensates by cyclically pumping vorticity into the condensate. However, multiply quantized vortices are typically dynamically unstable in harmonically trapped nonrotated condensates, which poses a serious challenge to the vortex pump procedure. In this theoretical study, we investigate how the giant vortices can be stabilized by the application of a Gaussian potential peak along the vortex core. We find that achieving dynamical stability is feasible up to high quantum numbers. To demonstrate the efficiency of the stabilization method, we simulate the adiabatic creation of an unsplit 20-quantum vortex with the vortex pump.

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Authors and Affiliations

  1. Department of Applied Physics/COMP, Aalto University, P.O. Box 14100, 00076, Aalto, Finland

    Pekko Kuopanportti & Mikko Möttönen

  2. Low Temperature Laboratory, Aalto University, P.O. Box 13500, 00076, Aalto, Finland

    Mikko Möttönen

Authors
  1. Pekko Kuopanportti
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  2. Mikko Möttönen
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Correspondence to Pekko Kuopanportti.

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Kuopanportti, P., Möttönen, M. Stabilization and Pumping of Giant Vortices in Dilute Bose–Einstein Condensates. J Low Temp Phys 161, 561–573 (2010). https://doi.org/10.1007/s10909-010-0216-1

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  • DOI: https://doi.org/10.1007/s10909-010-0216-1

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