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

TL;DR

This paper theoretically explores how dark-bright solitons can be dynamically generated in a two-component Bose-Einstein condensate system by interaction with a domain wall, revealing harmonic-like oscillatory behavior.

Contribution

It demonstrates the dynamic formation of dark-bright solitons outside stationary regimes and validates a semi-analytical model for their oscillation frequency.

Findings

Dark-bright solitons can be generated dynamically at domain walls.

The oscillation frequency matches semi-analytical predictions.

The process occurs outside known stationary solution regimes.

Abstract

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.