Modulational instability criteria for two-component Bose-Einstein condensates

Details Modulational instability criteria for two-component Bose-Einstein condensates Modulational instability criteria for two-component Bose-Einstein condensates

2005-05-12

arxiv.org/abs/cond-mat/0505324v1

Eur. Phys. J. B 46, 381-384 (2005)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 1 figure

Scientific paper

10.1140/epjb/e2005-00271-7

The stability of colliding Bose-Einstein condensates is investigated. A set of coupled Gross-Pitaevskii equations is thus considered, and analyzed via a perturbative approach. No assumption is made on the signs (or magnitudes) of the relevant parameters like the scattering lengths and the coupling coefficients. The formalism is therefore valid for asymmetric as well as symmetric coupled condensate wave states. A new set of explicit criteria is derived and analyzed. An extended instability region, in addition to an enhanced instability growth rate is predicted for unstable two component bosons, as compared to the individual (uncoupled) state.

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