51. Statics and dynamics of atomic dark-bright solitons in the presence of impurities.
- Author
-
Achilleos, V., Kevrekidis, P. G., Rothos, V. M., and Frantzeskakis, D. J.
- Subjects
- *
SOLITONS , *INDUSTRIAL contamination , *BOSE-Einstein condensation , *PERTURBATION theory , *COMPUTER simulation - Abstract
Adopting a mean-field description for a two-component atomic Bose-Einstein condensate, we study the statics and dynamics of dark-bright solitons in the presence of localized impurities. We use adiabatic perturbation theory to derive an equation of motion for the dark-bright soliton center. We show that, counterintuitively, an attractive (repulsive) delta-like impurity, acting solely on the bright-soliton component, induces an effective localized barrier (well) in the effective potential felt by the soliton; this way, dark-bright solitons are reflected from (transmitted through) attractive (repulsive) impurities. Our analytical results for the small-amplitude oscillations of solitons are found to be in good agreement with results obtained via a Bogoliubov-de Gennes analysis and direct numerical simulations. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF