Immiscible Bose-Einstein Condensates Research Articles

Capillary Waves at Cylindrical Interface of Two Immiscible Bose-Einstein Condensates

Capillary Waves at Cylindrical Interface of Two Immiscible Bose-Einstein Condensates

Dynamical generation of dark-bright solitons through the domain wall of two immiscible Bose-Einstein condensates

We theoretically investigate the one-dimensional dynamics of a dark soliton in a two-component immiscible mixture of Bose-Einstein condensates with repulsive interactions. We analyze the reflection and transmission of a soliton when it propagates through the domain wall, and we show that a dark-bright soliton can be dynamically generated by the interaction of the dark soliton with the domain wall, outside the regime of parameters where stationary solutions are known to exist. The dynamics of this dark-bright soliton is harmonic like, with a numerical frequency that is in good agreement with the predictions of a semi-analytical model.

Capillary Flotation in a System of Two Immiscible Bose–Einstein Condensates

A spatially inhomogeneous, trapped two-component Bose-Einstein condensate of cold atoms in the phase separation mode has been numerically simulated. It has been demonstrated for the first time that the surface tension between the components makes possible the existence of drops of a denser phase floating on the surface of a less dense phase. Depending on the harmonic trap anisotropy and other system parameters, a stable equilibrium of the drop is achieved either at the poles or at the equator. The drop flotation sometimes persists even in the presence of an attached quantized vortex.