Condensates have become an ultralow-temperature laboratory for atom optics, collisional physics and many-body physics, encompassing phonons, superfluidity, quantized vortices, Josephson junctions and quantum phase transitions.Expand

The sonic analog of a gravitational black hole in dilute-gas Bose-Einstein condensates is investigated. It is shown that there exist both dynamically stable and unstable configurations which, in the… Expand

It is shown that spatial inhomogeneity strongly affects dark-bright vector solitary wave solutions to the coupled nonlinear Schrödinger equations which describe an inhomogeneous two-species Bose-Einstein condensate, and that current technology suffices for their creation and control in ultracold trapped gases.Expand

We study the dynamics of a two-mode Bose-Einstein condensate in the vicinity of a mean-field dynamical instability. Convergence to mean-field theory (MFT), with increasing total number of particles… Expand

A second order phase transition induced by a rapid quench can inject far more topological defects into the ordered phase than would appear in equilibrium. We use quantum kinetic theory to show that… Expand

A method of generating a vortex ring in a Bose-Einstein condensate by means of electromagnetically induced atomic transitions so that the entire structure formed by the two condensates is an example of a three-dimensional Skyrmion texture.Expand

The study of environmentally induced superselection and of the process of decoherence was originally motivated by the search for the emergence of classical behavior out of the quantum substrate, in… Expand

We show how the length scale hierarchy, resulting from different interaction strengths in an optically trapped spin-1 23Na Bose-Einstein condensate, can lead to intriguing core deformations in… Expand

We study the dynamic process of splitting a condensate by raising a potential barrier in the center of a harmonic trap. We use a two-mode model to describe the phase coherence between the two halves… Expand