Soliton Dimer-soliton scattering in coupled Quasi-one-dimensional Dipolar Bose-Einstein Condensates

TL;DR

This paper investigates the complex inelastic scattering behaviors between a bright soliton and a soliton dimer in coupled dipolar Bose-Einstein condensates, revealing various interaction regimes including fusion, atom exchange, and elastic scattering.

Contribution

It introduces a detailed analysis of soliton-dimer scattering in coupled dipolar BECs, highlighting novel inelastic phenomena and specific scattering outcomes not previously characterized.

Findings

Dimer-soliton repulsion at low velocities

Atom exchange between dimer and soliton

Soliton fusion at intermediate velocities

Abstract

We discuss scattering between a bright soliton and a soliton dimer in coupled quasi-one-dimensional dipolar Bose-Einstein condensates. The dimer is formed by each soliton from both tubes due to the attractive inter-layer dipole-dipole interaction. The dipoles within each tube repel each other, and a stable, bright soliton is stabilized via attractive contact interactions. In general, the scattering is inelastic, transferring the kinetic energy into internal modes of both soliton dimer and single soliton. Our studies reveal rich scattering scenarios, including dimer-soliton repulsion at small initial velocities, exchange of atoms between dimer and single soliton and soliton fusion at intermediate velocities. Interestingly, for some particular initial velocities, the dimer-soliton scattering results in a state of two dimers. At large initial velocities, the scattering is elastic as expected.