Center motions of nonoverlapping condensates coupled by long-range dipolar interaction in bilayer and multilayer stacks

Chao Chun Huang, Wen Chin Wu

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We investigate the effect of anisotropic and long-range dipole-dipole interaction (DDI) on the center motions of nonoverlapping Bose-Einstein condensates in bilayer and multilayer stacks. In the bilayer, it is shown analytically that while DDI plays no role in the in-phase modes of center motions of condensates, out-of-phase mode frequency (ω o) depends crucially on the strength of DDI (a d). At the small-a d limit, ω 2 o(a d) - ω 2 o(0) ∝ a d. In the multilayer stack, transverse modes associated with center motions of coupled condensates are found to be optical-phonon-like. At the long-wavelength limit, phonon velocity is proportional to √a d.

Original languageEnglish
Article number053612
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
Publication statusPublished - 2010 Dec 6


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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