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Dark Matter-Wave Solitons in Optical Lattices
Pearl J. Y. Louis, Elena A. Ostrovskaya, Yuri S. Kivshar
We analyze the Floquet-Bloch matter-wave spectrum of Bose-Einstein condensates loaded into single-periodic optical lattices and double-periodic superlattices. In the framework of t…
Localization of Two-Component Bose-Einstein Condensates in Optical Lattices
Elena A. Ostrovskaya, Yuri S. Kivshar
We reveal underlying principles of nonlinear localization of a two-component Bose-Einstein condensate loaded into a one-dimensional optical lattice. Our theory shows that spin-depe…
Matter-wave gap solitons in atomic bandgap structures
Elena A. Ostrovskaya, Yuri S. Kivshar
We demonstrate that a Bose-Einstein condensate in an optical lattice forms a reconfigurable matter-wave structure with a band-gap spectrum, which resembles a nonlinear photonic cry…
Bose-Einstein Condensates in Optical Lattices: Band-Gap Structure and Solitons
Pearl J. Y. Louis, Elena A. Ostrovskaya, Craig M. Savage +1
We analyze the existence and stability of spatially extended (Bloch-type) and localized states of a Bose-Einstein condensate loaded into an optical lattice. In the framework of the…
Vortices in atomic-molecular Bose-Einstein condensates
Tristram J. Alexander, Yuri S. Kivshar, Elena A. Ostrovskaya +1
The structure and stability of vortices in hybrid atomic-molecular Bose-Einstein condensates is analyzed in the framework of a two-component Gross-Pitaevskii-type model that descri…
Modulational instability of spinor condensates
Nicholas P. Robins, Weiping Zhang, Elena A. Ostrovskaya +1
We demonstrate, analytically and numerically, that the ferromagnetic phase of the spinor Bose-Einstein condenstate may experience modulational instability of the ground state leadi…
Atom laser dynamics
Nicholas Robins, Craig Savage, Elena A. Ostrovskaya
An ideal atom laser would produce an atomic beam with highly stable flux and energy. In practice the stability is likely to be limited by technical noise and nonlinear dynamical ef…
Existence and stability of atomic-molecular Bose-Einstein condensates
Benedict J. Cusack, Tristram J. Alexander, Elena A. Ostrovskaya +1
We analyze the model of an atomic Bose-Einstein condensate (BEC) parametrically coupled to a molecular BEC via a photoassociation process. We show that an interplay of nonlinear in…
A model of a pumped continuous atom laser
N. Robins, C. Savage, E. Ostrovskaya
We present a model of a cw atom laser based on a system of coupled GP equations. The model incorporates continuous Raman outcoupling, pumping and three-body recombination. The outc…
Coupled-mode theory for Bose-Einstein condensates
Elena A. Ostrovskaya, Yuri S. Kivshar, Mietek Lisak +3
We apply the concepts of nonlinear guided-wave optics to a Bose-Einstein condensate (BEC) trapped in an external potential. As an example, we consider a parabolic double-well poten…