Generating and manipulating quantized vortices on-demand in a Bose-Einstein condensate: A numerical study

B. Gertjerenken, P. G. Kevrekidis, R. Carretero-González, and B. P. Anderson
Phys. Rev. A 93, 023604 – Published 1 February 2016

Abstract

We numerically investigate an experimentally viable method for generating and manipulating on-demand several vortices in a highly oblate atomic Bose-Einstein condensate (BEC) in order to initialize complex vortex distributions for studies of vortex dynamics. The method utilizes moving laser beams to generate, capture, and transport vortices inside and outside the BEC. We examine in detail this methodology and show a wide parameter range of applicability for the prototypical two-vortex case, as well as case examples of producing and manipulating several vortices for which there is no net circulation, corresponding to equal numbers of positive and negative circulation vortices, and cases for which there is one net quantum of circulation. We find that the presence of dissipation can help stabilize the pinning of the vortices on their respective laser beam pinning sites. Finally, we illustrate how to utilize laser beams as repositories that hold large numbers of vortices and how to deposit individual vortices in a sequential fashion in the repositories in order to construct superfluid flows about the repository beams with several quanta of circulation.

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  • Received 20 August 2015

DOI:https://doi.org/10.1103/PhysRevA.93.023604

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

B. Gertjerenken1,2, P. G. Kevrekidis1,3, R. Carretero-González4,*, and B. P. Anderson5

  • 1Department of Mathematics and Statistics, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9305, USA
  • 2Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg, Germany
  • 3Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
  • 4Nonlinear Dynamical Systems Group, Computational Science Research Center, and Department of Mathematics and Statistics, San Diego State University, San Diego, California 92182-7720, USA
  • 5College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA

See Also

Deterministic creation, pinning, and manipulation of quantized vortices in a Bose-Einstein condensate

E. C. Samson, K. E. Wilson, Z. L. Newman, and B. P. Anderson
Phys. Rev. A 93, 023603 (2016)

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Vol. 93, Iss. 2 — February 2016

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