On Some Configurations of Oppositely Charged Trapped Vortices in the Plane

Emilie Dufresne, Heather A Harrington, Panayotis G Kevrekidis, Paolo Tripoli, Jonathan D. Hauenstein

Research output: Contribution to journalArticlepeer-review

Abstract

Our aim in the present work is to identify all the possible standing wave configurations involving few vortices of different charges in an atomic Bose-Einstein condensate (BEC). In this effort, we deploy the use of a computational algebra approach in order to identify stationary multi-vortex states with up to 6 vortices. The use of invariants and symmetries enables deducing a set of equations in elementary symmetric polynomials, which can then be fully solved via computational algebra packages within Maple. We retrieve a number of previously identified configurations, including collinear ones and polygonal (e.g. quadrupolar and hexagonal) ones. However, importantly, we also retrieve a configuration with 4 positive charges and 2 negative ones which is unprecedented, to the best of our knowledge, in BEC studies. We corroborate these predictions via numerical computations in the fully two-dimensional PDE system of the Gross-Pitaevskii type which characterizes the BEC at the mean-field level.
Original languageEnglish
JournalAdvances in Applied Mathematics
Early online date16 Dec 2020
DOIs
Publication statusE-pub ahead of print - 16 Dec 2020

Bibliographical note

29 pages, 3 figures
© 2020 Elsevier Inc. All rights reserved. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.

Keywords

  • Bose-Einstein condensates
  • standing wave vortex configurations in the plane
  • symbolic computational methods
  • Invariant theory

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