Elementary excitations of a Bose-Einstein condensate in an effective magnetic field

D.R. Murray, Stephen M. Barnett, P. Ohberg, Damià Gomila

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Abstract

We calculate the low-energy elementary excitations of a Bose-Einstein condensate in an effective magnetic field. The field is created by the interplay between light beams carrying orbital angular momentum and the trapped atoms [G. Juzelinas et al., Phys. Rev. A 71, 053614 (2005)]. We examine the role of the homogeneous magnetic field, familiar from studies of rotating condensates, and also investigate spectra for vector potentials with a more general radial dependence. We discuss the instabilities which arise and how these may be manifested.
Original languageEnglish
Article number053626
Number of pages8
JournalPhysical Review A
Volume76
Issue number5
DOIs
Publication statusPublished - 29 Nov 2007

Keywords

  • magnetic field
  • Bose-Einstein
  • light beams
  • light
  • optics
  • physics

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