Collective modes of vortex lattices in two-component Bose-Einstein condensates

  title={Collective modes of vortex lattices in two-component Bose-Einstein condensates},
  author={Takumi Yoshino and S. Furukawa and S. Higashikawa and Masahito Ueda},
  journal={Bulletin of the American Physical Society},
We study collective modes of vortex lattices in two-component Bose-Einstein condensates subject to synthetic magnetic fields in mutually parallel or antiparallel directions. By means of the Bogoliubov theory with the lowest-Landau-level approximation, we numerically calculate the excitation spectra for a rich variety of vortex lattices that appear commonly for parallel and antiparallel synthetic fields. We find that in all of these cases, there appear two distinct modes with linear and… Expand
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