Partial delocalization of two-component condensates in optical lattices
arXiv:0709.1938 · doi:10.1088/0953-4075/41/3/035304
Abstract
We study management of localized modes in two-component (spinor) Bose-Einstein condensates embedded in optical lattices by changing interspecies interactions. By numerical integration of the coupled Gross-Pitaevskii equations, we find three different regimes of the delocalizing transition: i) the partial delocalization when the chemical potential of one of the components collapses with a gap edge and the respective component transforms into a Bloch state, while the other component remains localized; ii) the partial delocalization as consequence of instability of one of the components; and iii) the situation where the vector soliton reaches limits of the existence domain. It is shown that there exists a critical value for interspecies scattering length, below which solutions can be manipulated and above which one of the components is irreversibly destroyed.
8 pages, 5 figures
References in corpus (3)
- Modulation instability and solitary wave formation in two-component Bose-Einstein condensates
- Delocalizing transition in one-dimensional condensates in optical lattices due to inhomogeneous interactions
- Mixed symmetry localized modes and breathers in binary mixtures of Bose-Einstein condensates in optical lattices