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.
|Original language||English (US)|
|Number of pages||6|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|State||Published - 1997|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics