Mixed symmetry localized modes and breathers in binary mixtures of Bose-Einstein condensates in optical lattices
arXiv:cond-mat/0702330 · doi:10.1103/PhysRevA.76.013603
Abstract
We study localized modes in binary mixtures of Bose-Einstein condensates embedded in one-dimensional optical lattices. We report a diversity of asymmetric modes and investigate their dynamics. We concentrate on the cases where one of the components is dominant, i.e. has much larger number of atoms than the other one, and where both components have the numbers of atoms of the same order but different symmetries. In the first case we propose a method of systematic obtaining the modes, considering the "small" component as bifurcating from the continuum spectrum. A generalization of this approach combined with the use of the symmetry of the coupled Gross-Pitaevskii equations allows obtaining breather modes, which are also presented.
arXiv comment11 pages, 16 figures
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