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Emergence and Stability of Vortex Clusters in Bose-Einstein Condensates: a Bifurcation Approach near the Linear Limit
Physica D: Nonlinear Phenomena (2011)
  • S. Middelkamp
  • Panos Kevrekidis, UMASS, Amherst
  • D. J. Frantzeskakis
  • R. Carretero-Gonzalez
  • P. Schmelcher
Abstract
We study the existence and stability properties of clusters of alternating charge vortices in Bose-Einstein condensates. It is illustrated that such states emerge from cascades of symmetry-breaking bifurcations that can be analytically tracked near the linear limit of the system via weakly nonlinear few-mode expansions. We present the resulting states that emerge near the first few eigenvalues of the linear limit, and illustrate how the nature of the bifurcations can be used to understand their stability. Rectilinear, polygonal and diagonal vortex clusters are only some of the obtained states while mixed states, consisting of dark solitons and vortex clusters, are identified as well.
Disciplines
Publication Date
September 1, 2011
Publisher Statement

DOI:10.1016/j.physd.2011.06.002

This is the pre-published version harvested from arXiv. The published version is located at http://www.sciencedirect.com/science/article/pii/S0167278911001424
Citation Information
S. Middelkamp, Panos Kevrekidis, D. J. Frantzeskakis, R. Carretero-Gonzalez, et al.. "Emergence and Stability of Vortex Clusters in Bose-Einstein Condensates: a Bifurcation Approach near the Linear Limit" Physica D: Nonlinear Phenomena Vol. 240 Iss. 18 (2011)
Available at: http://works.bepress.com/panos_kevrekidis/244/