Effects of interaction imbalance in a strongly repulsive one-dimensional Bose gas

TL;DR

This paper investigates the spatial distributions and dynamics of a strongly interacting two-component Bose gas in one dimension, revealing how population imbalances influence density profiles and the propagation of minority particles as wave packets.

Contribution

It provides a detailed analysis of the effects of interaction imbalance on the spatial and dynamical properties of a strongly interacting 1D Bose gas, including novel insights into minority particle behavior.

Findings

Minority particles can propagate as wave packets under certain interaction ratios.

Density distributions depend on interaction and population imbalances.

System dynamics show complex behavior influenced by interaction strength.

Abstract

We calculate the spatial distributions and the dynamics of a few-body two-component strongly interacting Bose gas confined to an effectively one-dimensional trapping potential. We describe the densities for each component in the trap for different interaction and population imbalances. We calculate the time evolution of the system and show that, for a certain ratio of interactions, the minority population travels through the system as an effective wave packet.