Quasiparticle instabilities in multicomponent atomic condensates
E. V. GoldsteinOptical Sciences Center, University of Arizona, Tucson, Arizona 85721Pierre MeystreOptical Sciences Center, University of Arizona, Tucson, Arizona 85721
1997en
ABI
Abstract
We extend the Hartree-Bogoliubov theory to the case of a multicomponent Bose condensate and determine the resulting quasiparticle frequency spectrum. We show that interferences resulting from cross coupling between the condensate components can lead to a reversal of the sign of the effective two-body interaction and to the onset of spatial instabilities.
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Cited by 20 references