Phase separation of multi-component Bose–Einstein condensates in optical lattices

Phase Separation of Multi-Component Bose-Einstein Condensates in an Optical Lattice

In this paper, we analyze phase separation of multi-component Bose-Einstein Condensates (BECs) in the presence of a strong optical lattice. This paper is in threefold. We first prove that when the inter-component scattering lengths go to infinity, phase separation of a multi-component BEC occurs. Furthermore, particles repel each other and form segregated nodal domains. Secondly, we show that t...

Partial delocalization of two-component condensates in optical lattices

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 ed...

Localization of two-component Bose-Einstein condensates in optical lattices.

We study nonlinear localization of a two-component Bose-Einstein condensate (BEC) in a one-dimensional optical lattice. Our theory shows that spin-dependent optical lattices can be used to effectively manipulate the nonlinear interactions between the BEC components, and to observe composite localized states of a BEC in both bands and gaps of the matter-wave spectrum.

Phase separation and dynamics of two-component Bose-Einstein condensates

We study the interactions between two atomic species in a binary Bose-Einstein condensate to revisit the conditions for miscibility, oscillatory dynamics between the species, steady-state solutions, and their stability. By employing a variational approach for a quasi-one-dimensional, two-atomic species condensate, we obtain equations of motion for the parameters of each species: amplitude, widt...

Bose-Einstein Condensates in Optical Quasicrystal Lattices