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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2935-2940 |
| Number of pages | 6 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 55 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1997 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics